Zucchini Pizza Casserole

Name: Zucchini Pizza Casserole
Cuisine: European, Mediterranean, Italian, American
Ingredients: 3 medium zucchini, shredded (about 4 cups); sea salt and ground pepper, to taste; 1/2 cup grated parmesan cheese; 2 large eggs, room temperature; 1 cup freshly shredded mozzarella, divided; 1 tsp oregano; 1 tsp garlic powder; 1 tsp onion powder; 2 cups shredded leftover chicken or turkey; 1/2 cup marinara sauce; a few high-quality pepperoni slices