When does a pizza stop being a pizza?

yep, that's lettuce on there.

As you are well aware, I love pizza. As I was eating my pizza today I wondered at what point something stops being pizza and it becomes something else. I don't know. I think that as long as it is on a crust I will consider it pizza, though I admit that the one I had today was pretty far removed from traditional pepperoni pizza.

Today I decided that an excellent pizza topping would be sweet potatoes. Because, really, sweet potatoes are delicious and why wouldn't they be delicious on a crust? So I chopped up a couple small ones and roasted them on the stove till they were nice and soft and then threw them on a crust with some cheese. So good. Granted, my crust had been in the freezer a little too long so it ended up being a very thin crust pizza, but that's ok too. I also thought that it would be nice to have something with the sweet potatoes, but I didn't have a lot of other things, so I threw on some romaine lettuce. I figure, people cooks lots of other kinds of leafy greens, why not lettuce? But, I was a little bit wary, so I only put it on part of the pizza.

It turned out pretty good. The lettuce gives it just a little different texture, but it doesn't really change the flavor a lot. I think next time I'll put lettuce on the whole thing. And the sweet potatoes were just as delicious as I figured they would be. They are such a versatile root. I am grateful for them.