Fresh baby spinach (instead of tomato sauce)
Mozzarella
Goat milk mozzarella (a revelation)
Mushrooms
Red onion
Cherry tomatoes
Broccoli
Ham
Walnuts
Garlic
Parmesan
Fresh basil
I would say the fresh basil is probably the single most important ingredient. Like I said, it really gives the pizza that estival feel. I put approximately 8 times more cheese than you should (which I suggest you do if you're a turophile as I - basically I added cheese after every ingredient). And the walnuts are the second most important ingredient. I love walnuts, I think they go well with everything! Sprinkle some parmesan if you happen to have some, and stick it in the oven (you can also try it on the BBQ apparently). Twelve minutes - and some fresh basil leaves - later: pizza perfection!