I really love Tony Tutto. It's a small, artisan, pizza shop that happens to be all vegetarian (with half the menu being vegan) and easily is the best pizza shop in the Bay Area, in my opinion. There are no gimmicks here---no gluten-free crusts, no vegan cheese---just simple, fresh vegetable toppings and a hand-tossed crust. While I do wish they had a whole wheat crust option, I still appreciate the elegance and simplicity of the menu here.
The "some like it hot" pizza ($11) is awesome: aside from tomatoes, the sauce includes garlic, calabrian peppers, and a few other things and is spicy and pops with flavor and savoriness. The crust, though made with white flour, is just slightly crunchy and slightly chewy, akin to the crusts you'd find in one of the top three pizza centers of the US (that is, New Haven, Connecticut).
You really can't go wrong with any of the pizzas. The magic mushroom is also great, and they can make it without cheese if you're vegan.
The restaurant is bare-bones: just a few outdoor tables and some basic plastic chairs and tables on the inside (which looks more like a a small Italian deli).
Don't come here in a rush; expect to sit back and relax while waiting for your pizza. Tony's is one of those joints where you feel at home and Tony himself is a friendly and helpful guy; you feel like he's your own uncle and you're being treated to a wonderful meal.
Any time I'm in Marin County I make it a point to go to Tony Tutto.