Beef stroganoff

Beef stroganoff

Ingredients 2 tablespoons plain flour 700g beef rump steak, trimmed, thinly sliced 40g butter, chopped 1 1/2 tablespoons olive oil 1 large brown onion, halved, thinly sliced 2 garlic cloves, finely chopped 1/2 teaspoon sweet paprika 400g button mushrooms, sliced