Here are two that are tasty and very easy (you may notice that I'm not as partial to the tomato sauce-type pizzas!)
I saute (slowly) a couple of onions in a little olive oil till very soft and a little sweetish, then spread the onions on a pizza crust, scatter some gorgonzola cheese (not much needed since it has such a distinctive flavor, but use as much as you like), and sprinkle some fresh rosemary, salt and fresh ground pepper - coarse grind is best. Depending on how moist the onions look (or just for taste) you can add a little olive oil as well - then bake as usual. I don't know how "healthy" this is, but you can get away with very little cheese, which has to help!
Another favorite at our place is this simple pizza of sliced tomatoes, mozzarella and basil, with a little olive oil drizzled over top and salt and pepper - I reserve some of the basil leaves to add after the pizza comes out of the oven, so you get some of the fresh basil flavor. This is a great one where tomatoes (even cherry tomatoes) and basil are right out there in the garden (or at least very fresh)!
Yum! Oh, hey, it's lunch time!