Simple Salisbury Steak
["1 can mushroom soup, divided", "1 lb. ground beef", "1/3 c. dry bread crumbs", "1 egg, beaten", "1/4 c. finely chopped onion", "1 1/2 c. sliced mushrooms"]
["In bowl, mix thoroughly 1/4 cup soup, ground beef, bread crumbs, egg and onions.", "Shape into 6 patties.", "In skillet over medium heat, cook patties a few at a time until browned on both sides.", "Spoon off fat."]
["mushroom soup", "ground beef", "bread crumbs", "egg", "onion", "mushrooms"]