Slow-braised diced beef with carrot, soft onion slices and potatoes in brown gravy

Oven-braised beef

How to Cook Diced Beef: Slow-Braised Beef with Root Vegetables

Published 08 October 2026 · Updated 25 October 2026

Browned beef, sweet carrot and soft onion settle into a thyme-scented gravy in this British casserole for two. The beef is braised until tender before the potatoes go in, giving their floury edges less time to break down in the sauce.

Not kitchen tested by The Black Farmer.
Serves 2
Prep 25 min
Cook 184 min
Total 219 min

Timing: Estimated first-check-ready baseline: 25 minutes preparation + 184 minutes cooking/finishing + 10 minutes rest = 219 minutes from preparation to serving. This assumes beef is tender at its initial 2-hour check, potatoes are ready at their first 20-minute check and no reduction is needed; it is not a promised tenderness time. Preparation is one 25-minute window: preheat starts at offset 0 for 20 minutes, stock heating at offset 20 for 5 minutes. No other overlap is claimed. Always count the initial 3-minute beef check and the separate 2-minute potato addition, including after any beef extension. Add 15 minutes per beef-only extension (12 cooking + 3 checking/top-up/transfer); add 10 minutes per joint extension after the first potato check (7 cooking + 3 checking/top-up/transfer); add 5 minutes per uncovered reduction cycle including its check. Total is 219 + 15B + 10J + 5R minutes, where B/J/R are non-negative integer cycle counts. These are planning allowances, not maximum times: add actual overruns for heating, checking, transfers, browning or water heating to both cooking and elapsed time rather than rushing the cue. All components stay in the actively cooking casserole; there is no separated-component hold, cooling or reheating route. Rest precedes final seasoning/portioning. Untimed storage, thawing and separately prepared accompaniments are outside the serve-immediately estimate; no marination or before-serving cooling is prescribed.

Ingredients

  • Beef Stock In a Can - 500ml

    Beef stock

    350ml

    Heat during preparation. Buy one 500ml can and use 350ml; transfer the unused 150ml to a covered container, refrigerate and follow the label.

    £4.10

Adds 1 items across 1 products — £4.10 total.

Pantry ingredients such as oil, salt and herbs are not included.

Other Ingredients You'll Need

  • Diced beef — 340g (Aim for pieces about 3cm across; halve any much larger pieces. Pat dry. Weigh 340g for two servings; this is a recipe amount, not a promised shop pack size. Choose beef suitable for slow braising and follow its storage label.)
  • Rapeseed or vegetable oil — 1 tbsp (15ml), divided: 1 tsp for the first beef batch, 1 tsp for the second and 1 tsp for the vegetables (1 tsp for each of two browning batches; final 1 tsp for the vegetables.)
  • Brown onion — 1 medium (Peel, halve and slice 1cm thick; onion softens into the gravy.)
  • Carrot — 1 large (Peel and cut into 3cm lengths, halving thick ends lengthways to roughly 2cm thickness.)
  • Celery — 1 stick (Trim and slice 1cm thick.)
  • Garlic — 2 cloves (Peel and finely chop.)
  • Plain flour — 1 tbsp (Stir into the vegetables with the tomato purée.)
  • Tomato purée — 1 tbsp (Cook with the flour before adding stock.)
  • Worcestershire sauce — 1 tsp
  • Dried thyme — 1 tsp
  • Bay leaf — 1
  • Maris Piper potatoes — 400g (Peel and cut into 3cm chunks; keep submerged in cold water in the fridge until needed, then drain. Add once the beef is tender.)
  • Fine salt and black pepper — to taste (A little on the beef before browning; adjust the gravy after resting.)
  • Hot water — 25ml at a time, only if needed (For deglazing if the base catches or to restore the braising liquid level. Heat only as needed during the budgeted checking stages.)

Method

Prepare and preheat

Allow 25 minutes for weighing, peeling and cutting all ingredients, drying and lightly seasoning the beef with salt and pepper, and setting out the equipment. Start the oven at 160°C conventional/140°C fan at the beginning; allow about 20 minutes to preheat within this preparation window. Heat the measured stock in a small saucepan during the final 5 minutes of preparation. Put the prepared potato chunks in a bowl of cold water in the fridge so they do not discolour. Refrigerate the unused beef promptly and wash hands, utensils and surfaces after handling raw meat.

Heat the casserole

Use a heavy, flameproof, oven-safe lidded casserole of about 2.5 litres and 20cm internal diameter. This method uses the same vessel on the hob and in the oven; do not put a hob-incompatible dish over a flame. Heat the casserole with 1 tsp of the oil over medium-high heat for about 2 minutes, until the oil shimmers without smoking.

Brown two small batches

Add half the beef in a single layer with spaces between the pieces. Brown for about 5 minutes in total, turning to colour two or three broad surfaces; this is not 5 minutes on every face. Look for a deep brown crust, not cooked centres. Allow 1 minute to move the first batch to a plate and add another 1 tsp oil, then 1 minute to let the pan regain heat. Brown the second batch for about 5 minutes in total and allow 1 minute to lift it onto the same plate. If the base begins to blacken, lower the heat rather than letting the browned juices burn.

Soften the vegetables

Reduce the hob to medium-low. Add the final 1 tsp oil, onion, carrot and celery. Cook for about 7 minutes, stirring, until the onion is softened around the edges. If the base catches, add 25ml hot water and scrape it gently; do this within the vegetable stage rather than adding more oil. Add the garlic and stir for 30 seconds, then stir in the flour and tomato purée for 1½ minutes, until no dry flour remains and the purée darkens slightly.

Make the gravy and transfer

Allow 3 minutes to pour in the 350ml hot stock gradually, stirring and scraping up brown, not burnt, deposits. Add the Worcestershire sauce, dried thyme and bay leaf, and return the beef and all its plate juices. Allow about 4 minutes over medium heat to bring the sauce just to a gentle simmer. In this small casserole the liquid should reach roughly three-quarters of the way up the beef and vegetables; add hot water in 25ml measures if needed. Cover tightly and allow 1 minute to transfer to the preheated oven.

Braise until the beef is tender

Cook covered for 2 hours at 160°C conventional/140°C fan. Allow 3 minutes to remove the casserole, test several pieces of beef with a fork and check the liquid level. The beef is ready for the next stage when a fork enters easily and the meat separates with gentle pressure, without a springy or resistant centre. If it is already fully tender, go straight to step 7; do not give it extra beef-only cooking. If still resistant, keep all the beef and vegetables in the casserole, cover and return to the oven in 15-minute cycles: allow 12 minutes of covered cooking and 3 minutes to remove, test, top up with hot water in 25ml measures if needed and return, or move to step 7 once tender. Keep the sauce gently bubbling, not boiling hard. The cut of beef affects the time needed, so follow the fork test rather than the clock.

Add the potatoes and check early

Once the beef is tender, allow 2 minutes to drain the potatoes, tuck them into the gravy and top up with hot water in 25ml measures if needed so they are mostly in the liquid. Keep the beef in the casserole, cover and return to the oven. Cook for 20 minutes, then allow 3 minutes to remove and test a potato with a small knife and check the beef and liquid. The potato should have no hard centre and the beef should still yield easily to a fork. If either needs more cooking, leave everything together, cover and continue in 10-minute cycles: 7 minutes in the oven and 3 minutes for removal, testing, any hot-water top-up and return or progression to step 8. Move on as soon as both are ready. Do not lift out a ready component to wait beside the hob. Beef that was already tender stays in the gravy during this potato stage; it may become more fragile or less juicy, especially if lean. Floury potatoes may soften or crumble if the beef unexpectedly needs longer, so turn them gently and stir as little as possible. Soft edges are expected, not guaranteed intact cubes.

Adjust, rest and season

Allow 2 minutes to remove the bay leaf and assess the gravy. It should lightly coat a spoon; if too thick, stir in a little hot water. If too thin, simmer everything together uncovered on the hob over medium-low heat in 5-minute cycles, including a check at the end of each cycle, until the sauce lightly coats a spoon. Stir gently and add a little hot water if needed to prevent sticking; further simmering can soften the potatoes. Make sure the casserole is steaming hot throughout before taking it off the heat. Rest covered off the heat for 10 minutes, then allow 2 minutes to taste, adjust the salt and black pepper and divide between two bowls. Serve immediately.

Serving Suggestion

Serve in deep bowls with the potatoes and plenty of gravy. Add crusty bread if wanted, or a small portion of Garlic Butter Kale for a dark-green contrast. Bread and kale are additional accompaniments, not included in the ingredients, basket or timings.

Frequently Asked Questions

How long should I allow for this diced beef casserole?

The first-check-ready estimate is 219 minutes from preparation to serving, including a 2-hour beef braise and an initial 20-minute potato cook. Beef must pass the fork test before potatoes enter. Add 15 minutes per beef-only extension, 10 minutes per joint beef-and-potato extension and 5 minutes per gravy-reduction cycle, plus any other stage overrun. This is not a guarantee that beef or potatoes will be ready at the first check.

Why is my beef still firm when the timer ends?

Diced beef can come from different cuts, and its size and connective tissue affect how quickly it softens. Keep it covered at the stated oven temperature, maintain the liquid level and follow the method’s extension cycles rather than increasing the heat. Do not assume browning means the meat is tender.

Why are the potatoes added later?

Floury Maris Piper potatoes can crumble during a long braise. Add them only once the beef is tender and check after 20 minutes, then at the end of each 10-minute extension cycle. If beef is already tender at the first check, add potatoes without an extra beef-only cycle. Keep everything together in the gravy rather than lifting out cooked pieces to wait; longer cooking may soften potatoes and make lean beef less juicy.

Do I need to cook a whole pack, and what is in the basket?

No. Weigh 340g raw diced beef for two; buying a larger pack does not change the recipe quantities. Promptly refrigerate any unused raw beef in a clean sealed container on the bottom shelf, follow its use-by and after-opening instructions, and freeze only if the label allows. The recipe basket supplies only one 500ml can of beef stock: use 350ml, leaving 150ml to transfer to a covered container, refrigerate and use according to its label. Beef, carrot, celery and the other pantry ingredients remain required but are not in this basket.

Will freezing change the potatoes?

Floury potatoes can soften or crumble further after freezing and reheating. Cool leftovers promptly in small containers and refrigerate or freeze safely; thaw fully in the fridge and reheat until steaming hot throughout. Follow the Food Standards Agency guidance: https://www.gov.uk/government/publications/how-to-chill-freeze-and-defrost-food-safely/how-to-chill-freeze-and-defrost-food-safely. Storage and thawing are not part of this serve-immediately method or its 219-minute estimate.