Heat 1 tbsp coconut oil in a flameproof casserole dish or heavy-based saucepan. Season the beef with salt and pepper and then brown in pan, do it in three batches, adding a little extra oil for each batch. Set the browned meat aside.
Add in the remaining oil to the casserole dish, followed by the sliced onion, finely chopped garlic and diced red peppers. Fry until softened, around 5-10 minutes.
Return the beef to the pan with the tomato purée and paprika. Cook, stirring, for 2 minutes. Add the roughly chopped tomatoes, followed by the beef stock. Cover and bake in the oven for 1½-2 hours at 150°C.
Alternatively, cover and cook it on the hob on a gentle heat for about an hour, removing the lid after 45 minutes. When the beef is soft season to taste with salt and pepper.
To finish add the chopped flat-leaf parsley leaves, then add a dollop of sour cream or crème fraiche and serve with mixed salad of your choice.
Notes
Leftover goulash can be thinned out with more beef stock for a hearty soup for lunch the following day.