Vegan OptionsVeggie Shack (gluten-free option): Order with NO cheese, crispy onions or shake sauce. SUB the burger bun with their gluten-free bun (cost extra). We suggest asking for ketchup and/or mustard to use as a sauce. Veggie Shack Lettuce Wrap: Order with NO cheese, crispy onions or shake sauce. We suggest asking for ketchup and/or mustard to use as a sauce.