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Ingredients:
1 tbsp vegetable oil
1 tbsp butter
1 onion, thinly sliced
½ lbs crimini mushrooms, sliced
1 lbs beef steak, cut in strips
salt
pepper, freshly ground
½ cup beef stock
1-bay leaf
1 cup full fat creme fraiche or sour cream
Heat oil and butter in a heavy skillet and cook onions and mushrooms over medium-low heat for 7-10 minutes. Remove and set aside.
Add cut steak to the same skillet and quickly fry over high heat for 3-5 minutes.
Add stock, bay leaf, salt and pepper. Scrape the bottom of the pan with a spatula to release all the brown bits, they will add much flavour to the sauce.
Bring mushrooms and onions back to the pan and cook for 3 minutes until everything is heated through and bubbling.
Stir in sour cream and take off the heat.
Serve with rice, mashed potatoes or french fries.