10-minute beef stroganoff

1. Heat 2 tbsp of oil in a large frying pan over a high heat and cook the onions for 10-15 minutes or until they become softened with slightly browned edges. Remove with a slotted spoon and drain on kitchen paper. 2. Wipe the pan dry and add the mushrooms without any oil. Stir occasionally over a high heat to let them release all of their moisture, then add 1 tbsp of oil and allow them to colour a bit. Remove and add to the onions. 3. Heat the pan again, drizzle in a little more oil, add the steak and stir-fry for a few seconds. Return the mushrooms and onions, and stir well. Add the paprika, mustard, celery salt and a generous amount of black pepper, and stir again for a few seconds. Add the crème fraîche and combine until the sauce is an even colour. Reduce the heat to medium and cook for a couple of minutes to heat the sauce through. Sprinkle with a little more paprika before serving with fries or mash.