This green pizza is an exercise in simplicity—just a bit of full-flavored pesto and plenty of spinach yield a satisfying and healthy pie. No time to make homemade dough? Look for whole-wheat pizza-dough balls at your supermarket. Check the ingredient list to make sure the dough doesn't contain any hydrogenated oils. Serve it with a tomato-and-onion salad dressed with olive oil and red-wine vinegar.