Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.

Grate the zucchini and place it in a mixing bowl. Squeeze out excess moisture using a clean kitchen towel.

Add the beaten egg, mozzarella cheese, garlic powder, oregano, salt, and pepper to the zucchini. Mix until well combined.

Spread the zucchini mixture onto the prepared baking sheet in a circular shape, about 1/4 inch thick.

Bake in the preheated oven for 15-20 minutes, or until the edges are golden brown.

Remove the zucchini base from the oven and spread pizza sauce evenly over the top.

Sprinkle shredded mozzarella cheese over the sauce, then add pepperoni, bell peppers, and olives as desired.

Return to the oven and bake for an additional 10 minutes, or until the cheese is melted and bubbly.

Allow to cool for a few minutes before slicing and serving.