Tomato-free vegan pizza.

[sacrilegend]

That's right... NO TOMATOES! Pizza! Vegan! Help?

I've done just veggies with pesto before and it was okay, but I'm really hoping somebody's discovered the secret to a killer white sauce or something. I've tried replicating the white garlic sauce from Pizza Pi (for those of you that live in/have been to Seattle) with no success. Anybody?

Thanks!