100% Plant-Based Beyond Burger From Beyond Meat, American Cheese, Ketchup, Mustard, Mayonnaise, Lettuce, Tomato, Pickles, and Onions. Would you prefer a substitution?: Wheat Bun, No Bun, Green Style (Lettuce Bun) : $0.50. Would you like to add toppings?: Add Lettuce, Add Tomato, Add Pickles, Add Relish, Add Diced Onions. Would you like to add sauce?: Add BurgerFi Sauce, Add Ketchup, Add Mustard, Add Mayo, Add BBQ Sauce.