Gusto Pizza Co. is a gourmet pizza, sandwich and salad shop serving made-from-scratch dishes, wines and craft beers. They offer gluten-free crust (extra $3) and vegan mozzarella (extra $1.50 - $3 depending on pizza size). Their other suitable toppings include a variety of veggies.
They also have shops in West Des Moines and Johnston.
(can vary during public holidays)