Step 1

Put a tablespoon of olive oil in a large frying pan and then add the onions. Cook for about 3 minutes until softened.

Step 2

Add the sliced mushrooms and turn up the heat. Cook for a further 2 minutes.

Step 3

When the onions and mushrooms are lightly browned, add the garlic, paprika, salt and pepper, plus the leftover beef and any juices. Cook over a low heat for a further 3 minutes. Add a splash of water if it gets too dry.

Step 4

Finally, add the sour cream and heat gently until it just starts to bubble. Turn the heat off and sprinkle in the chopped parsley. Serve with the rice and kale, or whatever accompaniments you prefer.