Cook onion in butter until transparent. Remove from pan. Brown meat in same
pan. Return onions to pan. Stir in 2 tablespoons flour. Add mushrooms,
ketchup, paprika and sour cream. Salt and pepper to taste. Stir. Turn on
low and cook until meat is tender. Serve over cooked rice or noodles. If
beef mixture seems too thick, add a little milk to preferred consistency.