Enzomartinelli's Beef Stroganoff

Ingredients

 * 800 g of beef fillet, trimmed and cut into thin slivers
 * 500 g of mushrooms, rinsed well and sliced
 * 2 small onions, grated
 * 2 cloves of garlic
 * ¼ cup dry red wine or cognac
 * 1 cup sour cream or plain yogurt
 * 1 tsp Worcestershire sauce
 * 5 tbsp olive oil
 * 50 g butter
 * juice of ½ lemon
 * paprika
 * nutmeg
 * salt and pepper

Directions

 * 1) Season the meat with salt, pepper and Worcestershire sauce.
 * 2) Put a large heavy-bottomed saucepan over a high heat.
 * 3) Add 3 tbsp olive oil and when hot, add half the beef.
 * 4) Stir-fry briskly until lightly browned.
 * 5) Set aside in a bowl, add 2 tbsp more oil to the pan and repeat the process with the remaining meat.
 * 6) Remove the second batch of seared meat and its juices, reduce the heat and melt the butter in the saucepan.
 * 7) Add the onions, the garlic and gently fry until very soft.
 * 8) Add the mushrooms to the stir fry and cook until tender.
 * 9) Add the meat with any juices and pour over the cognac or red wine.
 * 10) Immediately set alight and shake the pan until the alcohol has burnt itself out.
 * 11) Stir in the sour cream or yogurt.
 * 12) As soon as it is hot, mix in the lemon juice, season to taste and sprinkle with a little paprika and nutmeg.
 * 13) Serve immediately with steamed or boiled white rice.