Preheat the oven to 200C/180C Fan/Gas 6. Place a large saucepan over a high heat
add 1 tablespoon of the oil and brown the beef in batches so the pan isn't too full. Remove the beef from the pan and set aside on a plate. Don't clean the pan
as you'll need it to fry the vegetables.
While the beef is frying
peel and chop the onions and carrots and slice the celery.
Heat the remaining oil in the same saucepan and fry the onion
celery and carrot for 4–5 minutes
or until the onions have softened. Scrape any cooked on bits from the bottom of the pan; this will add flavour to the stew. Season with salt and pepper.
Mix the beef with the vegetables
then take the pan off the heat. Tip the meat and vegetables into a large ovenproof dish and pour the stock over the top.
Peel and slice the potatoes into ½cm/¼in-thick slices and arrange over the top of the beef. Dot the butter over the top
then cover tightly with foil. Bake for 1 hour
then remove the foil and bake for a further 15 minutes
until the potatoes are crisp and golden-brown. Serve in deep bowls.
