1 lb. of beef (hamburger works fine)
1/4 c. butter
1/2 lb. of mushrooms
1/2 c. chopped onions
1 c. of beef stock
1 c. sour cream
2 tbsp. flour
Salt and pepper

Mix sour cream, flour and salt and pepper together. Saute mushrooms. Brown meat in 1/4 cup butter, add onions and mushrooms. Push meat to side and add beef broth. Heat to boiling point. Add sour cream and flour mixture. Cook until it thickens. Serve over noodles or rice.