Pizza Studio offers a specialty pizza called The Vegan, and it's pretty good. Like all their pizzas, it's a sparsely topped 11" thin crust. It's probably enough to feed two adults who aren't terribly hungry. I usually share one with my two toddlers. It's topped with red sauce, Daiya mozzarella, and veggies including fried potatoes. You can build your own pizza as well. The service is always friendly (get a tip jar, guys!), and the food is ready within several minutes.
There are a few things that would inspire me to give the place another star or two: 1) I'd love to see a mock meat on the menu. Even tofu would do the trick. 2) If you're going to call a menu item The Vegan, you probably don't need to ask whether customers would like it made vegan or charge $1 extra for vegan cheese. 3) The employees need to study up on The Vegan. They told me that the Daiya they use was a soy cheese (it isn't), and they put the wrong toppings on it the last time I was in (it was still good).
Any restaurant at the Mall of America that has a good vegan option clearly labeled on their menu has my business. I'll be back.