Salisbury Steak With Onion Gravy
["1 (10 1/2 oz.) can condensed onion soup", "1 1/2 lb. ground beef", "1/2 c. fine dry bread crumbs", "1 egg, slightly beaten", "1/4 tsp. salt", "dash of pepper", "1 Tbsp. flour", "1/4 c. ketchup", "1/4 c. water", "1 tsp. Worcestershire sauce", "1/2 tsp. prepared mustard"]
["In a bowl, combine 1/3 cup soup with beef, crumbs, egg, salt and pepper.", "Shape into 6 oval patties.", "Brown patties in skillet. Gradually blend", "remaining", "soup", "into", "flour", "until smooth.", "Add remaining", "ingredients", "to skillet.", "Stir.\tCover and cook over low heat for 20 minutes.", "Stir often."]
["condensed onion soup", "ground beef", "bread crumbs", "egg", "salt", "pepper", "flour", "ketchup", "water", "Worcestershire sauce", "mustard"]