Preheat the oven to 375°F (190°C).
In a large mixing bowl, combine the cottage cheese, mozzarella cheese, Italian seasoning, garlic powder, salt, and pepper. Mix until well blended.
In a baking dish, spread the cottage cheese mixture evenly on the bottom.
Pour the pizza sauce over the cottage cheese mixture, distributing it evenly.
Top with diced bell peppers, sliced mushrooms, diced tomatoes, and olives.
Sprinkle grated Parmesan cheese on top if using.
Bake in the preheated oven for 20 minutes, or until the cheeses are melted and bubbly.
Remove from the oven and let cool for a few minutes before serving.
Serve the pizza bowl hot, and enjoy with a side salad for a complete meal.