Does anybody have a fairly easy pizza recipe?

So, I want to make a pizza tonight for dinner, I have a dough going in the bread machine already, but I was wondering about toppings and sauce, for my sauce, can I just use some leftover tomato pasta sauce? What about cheese? I have mozerella and cheddar and I probably have some parmasean somewhere, but I'm not sure. Also, toppings? I don't want meat, and I have spinach, onions, mushrooms, would any of those be good? Thanks!