Use a sharp knife to cut the steak into large, bite-sized chunks.
1 kilogram rump steak
Place the beef in a large bowl and add the Worcestershire sauce. Stir well so every piece is coated.
4 Tablespoons Worcestershire sauce
Cover the bowl and leave the beef to marinate in the fridge for at least 30 minutes.
Meanwhile, combine the beef stock, red wine, tomato paste and sugar in a large jug or mixing bowl. Stir until the tomato paste is evenly mixed through.
300 millilitre prepared beef stock, 300 millilitre red wine, 1 heaped tablespoon tomato paste, 2 teaspoons sugar
Heat half the butter and half the oil in a medium-large, heavy-based saucepan over medium-high heat.Once the butter and oil are sizzling, brown the beef in batches until golden on all sides. Avoid overcrowding the pan, as the beef will steam rather than brown. Transfer each browned batch to a clean plate or bowl and set aside. Keep any Worcestershire marinade left in the original bowl, as this will be added to the sauce and cooked thoroughly.
Reduce the heat to medium and add the remaining butter and oil. Add the chopped onions and chillies and cook for about 5 minutes, stirring occasionally, until the onions are soft and translucent.
150 grams onion, 2 red chillies
Add the garlic and cook for 30 seconds, stirring, until fragrant.
4 teaspoons garlic paste
Sprinkle over the flour and stir it through the onions. Cook for 1 minute, scraping the bottom of the pan as you stir.The flour may stick slightly, but that is fine. The browned residue will loosen when you add the liquid. 2 tablespoons plain flour
Pour in the prepared stock and wine mixture, along with any Worcestershire marinade left in the bowl.Stir well, scraping the bottom of the pan to loosen all the browned and sticky bits. These will melt into the sauce and add flavour. Reduce the heat to low and simmer for 2–3 minutes, stirring occasionally, until the sauce has thickened slightly and lightly coats the spoon.
3 bay leaves
Add the bay leaves, then return the browned beef and any juices collected on the plate to the pan. Stir until the beef is evenly coated in the sauce.
Bring the sauce to a very gentle simmer, with only a few small bubbles breaking the surface. Cover the pan tightly with a lid and cook over the lowest heat for 1½ hours.Check and stir the trinchado every 10–15 minutes, scraping the bottom to prevent sticking. If it begins to look dry, stir in a small splash of red wine or water.If there is too much liquid near the end, leave the lid slightly ajar for a few minutes to allow some steam to escape. Check that the beef is tender, then taste the sauce before adding salt. The beef stock and Worcestershire sauce are already salty, so you may need very little extra. Add the black pepper.
few good grinds of black pepper, salt to taste
Stir in the cream. You can use slightly less if the trinchado is already very saucy, or a little more if you would like to loosen the sauce.
150 millilitre double cream/heavy cream
Heat gently for 1–2 minutes, stirring, until the cream is fully combined and the sauce is smooth and hot. Do not let the sauce boil hard once the cream has been added.
Remove the pan from the heat and leave the trinchado to rest for 10 minutes before serving.
Serve with chunky chips/French fries or fresh white bread rolls for mopping up the sauce.