Drain excess liquid from the cottage cheese.

Blend cottage cheese with egg whites, gluten-free flour, garlic powder, Italian seasoning, salt, and pepper until smooth.

Preheat oven to 350°F (175°C) and prepare baking sheet with parchment paper.

Pour the crust batter onto the baking sheet and spread to about ¼ inch thick.

Bake for 32-35 minutes until edges are golden and center is firm.

Spread marinara sauce over the baked crust, sprinkle mozzarella cheese, and arrange turkey pepperoni.

Bake for an additional 5 minutes until cheese melts, optionally broil for 1-2 minutes for crispy edges.

Let cool for 7-10 minutes, then slice and serve.