I like all the ingredients in the recipe, but my concern is more with the execution of it all. Wouldn't the zucchini be way too flimsy and soft once it's grilled? I wouldn't want hot sauce and cheese falling down my arm. Plus, since it's only being grilled on one side, it may be raw on the other side with the sauce and cheese.
You might be able to do some sort of grilled zucchini rollup stuffed with cheese, sauce and pepperoni. Or simply putting the zucchini and other ingredients on a traditional pizza shell.
My folks have put zucchini slices on an egg pizza, topped with Parmesan cheese. You just take a regular pizza dough and rub the top down with some olive oil that's been mixed with a lot of fresh garlic. Then pour over some scrambled egg and add the zucchini and Parmesan and bake it. Season the pizza to taste with salt and pepper if need be.