INGREDIENTS:br 1 12 pounds Certified Angus Beef ® ground beef, 8020 leanbr 12 cup mayonnaisebr 1 tablespoon yellow mustardbr 1 tablespoon grated yellow onionbr 2 teaspoons hot saucebr 1 teaspoon Worcestershire saucebr 4 white hamburger bunsbr 2 tablespoons butter, room temperaturebr 1 12 teaspoons kosher saltbr 12 teaspoon pepperbr 4 slices American cheesebr 2 cups shredded iceburg lettucebr 8 slices vine-ripe tomatoes