Add Cheese: Mozzarella, Queso Fresco, American, Swiss, Provolone, Cheddar, Pepper Jack, Monterey Jack. Add Veggies: ($1, 50 each) Onions, Peppers, Spinach, Tomatoes, Mushrooms, Artichoke Hearts, Broccoli. Add Meat: ($1, 50 each) Serrano Ham, Bacon, Sausage Links