I've finally had the chance to try Francesca's pizza and it is really good! They pay a special attention to the ingredients and to the preparation. You can request it with tofu or mandiokeijo (a brazilian vegan cheese), but I went for it with just the toppings: shitake mushrooms and pesto sauce. It's a little expensive (but I felt that you get what you pay for) and delivery only, but it's worth for once in a while.
Cons: little expensive, delivery only