Hamburger Gravy

1 lb. lean ground beef ½ cup chopped onion 3 tablespoons flour 1 tablespoon beef-flavor instant bouillon 2 tablespoons steak sauce 2 cups milk In a large skillet, cook ground beef and onion over medium-high heat until beef is thoroughly cooked, stirring frequently.  Stir in flour, bouillon and steak sauce.  Gradually stir in milk.  Cook…