Yankee Noodle Bake
["4 frankfurters, sliced", "1/4 c. chopped onion", "2 Tbsp. margarine", "2 c. cooked noodles", "1 (10 oz.) can tomato soup", "1/2 c. water", "1 tsp. prepared mustard", "1/4 c. buttered bread crumbs"]
["Brown frankfurters and onion in margarine until onion is tender.", "Combine with noodles, soup, water and mustard in 1 1/2-quart casserole.", "Top with crumbs.", "Bake at 350\u00b0 for 30 minutes.", "Makes 4 servings."]
["frankfurters", "onion", "margarine", "noodles", "tomato soup", "water", "mustard", "buttered bread crumbs"]