This fancied-up variation of a burger is a must-try. I love the fresh, bright flavors of the salsa combined with the perfectly seasoned meatballs and creamy mozzarella. No store-bought condiments necessary. Spectacular lunch on a cold day. Beef Meatball Sandwich with Melting Mozzarella and Tomato Salsa Credit: Gordon Ramsay's Home Cooking by Gordon Ramsay Ingredients:...