Sloppy Joe Bake
["1 1/2 lb. ground beef", "1 small onion, chopped", "1 can tomato sauce", "1 Tbsp. mustard", "2 Tbsp. ketchup", "2 c. Bisquick", "1 egg", "1 c. milk"]
["Brown ground beef and onion; drain. Mix tomato sauce, ketchup and mustard with hamburger. Pour in pie plate. Mix Bisquick, milk and egg and pour on top. Bake 35 minutes at 350\u00b0."]
["ground beef", "onion", "tomato sauce", "mustard", "ketchup", "Bisquick", "egg", "milk"]