The (magic) key to this recipe is: "anything you like on pizza could be cooked on top of a thick slice of grilled or broiled zucchini".
Read the full details and directon at kalynskitchen.com - this is an awesome recipe, really worth to try it!!
Ingredients:
-large zucchini slices, cut 3/4 inch thick
-olive oil, for lightly brushing both sides of pizza and oiling grill grate
-pizza sauce of your choice
-grated cheese (I used a blend of low-fat cheese called "pizza cheese," but you can use any cheese you'd enjoy on pizza.
-pizza toppings of your choice