Clean and rinse zucchini well and pat dry.
Slice zucchini ¼ inch thick slices.
Salting Zucchini - Place slices in a bowl and add 1 teaspoon salt. Toss and let it sit for 20-30 minutes. Zucchini will seep out moisture. Remove the slices and wipe off all the moisture. You should see a good amount of water left in the bowl.
Note: salting zucchini will prevent it from turning soggy or watery when you bake.
Arrange dry zucchini slices on a greased baking tray.
Spray olive oil of the slices.
It’s time to add the toppings-
Start off with sauce. Spread ½ to 1 teaspoon of marinara or pizza sauce on each slice (you might need more sauce depending on the size of the slice)
Sprinkle generously dried oregano or Italian seasoning on top of the sauce.
Next add generous amount grated mozzarella on each slice.
Arrange a few pepperoni slices.
Season each slice with freshly ground pepper. You can skip adding pepper, but it does seasoning the zucchini well.
Bake in pre-heated oven at 400°F for 10-12 minutes or until cheese is melted and begin to brown.