I've got a funny story about Soy Cheese Pizza. I am severely lactose
intolerant and have been for some time. I worked in NYC for a while and was
very happy with the amount of lactose free and Pareve meals available there.
I decided to try a Kosher Pizzeria for a little tofu treat. I ordered a 12"
soy pepperoni pizza. I ate the entire pizza like a pig. It tasted better
than any soy cheese I'd had before but the pepperoni tasted a little funny.
As you may have guessed, a few hours later I was extremely sick and found
out the hard way that it was real mozzarella cheese with soy-based pepperoni
(thus making it kosher). I'm more careful to ask nowadays.
Dave