I looked at these on mobile, because I was curious, and the only choices are which meats you want. No further customization. I have no doubt if you order in person though, you would be able to leave the toppings off.When you mobile order there are drop down menus to 'customize' and you can remove items that are normally included, like sauces or toppings. If an option mobile, than certainly an option in person. FWIW, I LOVE to get at least one taco as cauliflower and either eat as a taco or as popper sides, they are fantastic.
I looked at these on mobile, because I was curious, and the only choices are which meats you want. No further customization. I have no doubt if you order in person though, you would be able to leave the toppings off.