In a 1 1/2 quart casserole, combine 2 cans Franco-American macaroni, a 7 ounce can tuna (drained and flaked), 1 tablespoon chopped dill pickle, 1 1/2 teaspoon prepared mustard. Top with 1/4 cup buttered bread crumbs. Bake at 400 degrees for 20 minutes. (If you like, use a 7 3/4 ounce can of salmon in place of tuna). 4 to 5 servings.