Quick Hamburger Casserole
["1 lb. ground beef", "1/4 c. chopped onion", "1/4 tsp. salt", "pepper to taste", "1 (16 oz.) can mixed vegetables, drained", "1 (10 1/2 oz.) can tomato soup", "1 (4 oz.) can mushrooms (optional)"]
["Brown ground beef and onion; drain.", "Add remaining ingredients and mix well.", "Pour into 1 1/2-quart casserole; bake at 400\u00b0 for 15 minutes.", "Serve with hot biscuits.", "Yield:", "4 to 6 servings."]
["ground beef", "onion", "salt", "pepper", "mixed vegetables", "tomato soup", "mushrooms"]