Preheat oven to 375 degrees. Spray a large baking sheet with non-stick spray.

Brown the sausage in a medium skillet over medium heat, crumbling as it cooks. Drain the grease and place sausage in a small mixing bowl.

Add the marinara and 1 ½ cups of mozzarella to the bowl. Stir to combine.

Slice the zucchini in half length-wise and use a spoon to scrape out the seeds.

Fill the hollowed space in the zucchini with the meat mixture.

Sprinkle the remaining mozzarella and the Parmesan on the zucchini.

Place 2 pepperoni on each zucchini.

Bake for 30 minutes or until the zucchini is as tender as you’d prefer.

Sprinkle with basil and red pepper flakes, if desired, before serving.