Beef stroganoff with matchstick potatoes Archive

Ingredients

• 675g/1½ lb beef fillet, preferably cut from the tail end
• 65g/2½oz unsalted butter
• 1½ tbsp paprika (hot Hungarian, if you like a little subtle heat)
• 1 large onion, very thinly sliced
• 350g/12oz button mushrooms, thinly sliced
• 3 tbsp sunflower oil
• 300ml/10fl oz soured cream
• 2 tsp lemon juice
• small handful of parsley leaves, finely chopped
• salt
• freshly ground black pepper
• 450g/1lb floury potatoes, such as Maris Piper, peeled
• sunflower oil, for deep-frying