Spread the zucchini rounds out on a parchment lined cookie sheet. Spray a light layer of oil before putting down the rounds.
Sprinkle some salt over each round.
Add a 1/2 tbsp of sauce to each round.
Cover each round with mozzarella cheese.
Sprinkle some of the bread crumbs over each round.
Place one pepperoni on each round.
Add to a 375f oven for 20-25 minutes.
Remove form the oven, let cool and enjoy.