Hot Combination Sandwich
["2 c. American cheese, cubed", "1 lb. chipped ham, chopped", "3/4 c. mayonnaise", "1/2 c. chili sauce", "4 medium onions, finely chopped or ground", "12 eggs, hard-cooked and chopped", "30 hamburger buns"]
["Combine all ingredients, except buns, in mixing bowl.", "Preheat oven to 425\u00b0.", "Cut 30 squares of aluminum foil."]
["American cheese", "chipped ham", "mayonnaise", "chili sauce", "onions", "eggs", "buns"]