Creating Cauliflower Pizza Casserole is a straightforward process when you follow these steps:

1. Preheat the Oven: Set your oven to 400°F (200°C) to prepare for baking.
2. Prepare Cauliflower: Rinse cauliflower and rice it either using a food processor or grater until it resembles fine grains.
3. Cook Cauliflower: In a large skillet over medium heat, cook the riced cauliflower for about 5–7 minutes, continuously stirring until slightly tender. Drain any excess moisture if necessary.
4. Mix Cauliflower Base: In a large mixing bowl, combine the cooked cauliflower, shredded mozzarella, grated Parmesan, eggs, garlic powder, onion powder, Italian seasoning, salt, and pepper. Mix well until fully incorporated.
5. Spread the Base: Transfer the mixture into a greased 9×13-inch casserole dish, spreading it evenly along the bottom.
6. Layer the Meat: Evenly distribute the cooked ground beef or sausage on top of the cauliflower layer.
7. Add Sauce: Pour the pizza sauce over the meat layer, spreading it evenly for full coverage.
8. Add Toppings: Sprinkle your desired additional toppings over the sauce, then top with extra mozzarella cheese if desired.
9. Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the cheese is melted and bubbly, and the edges are lightly golden.
10. Cool and Serve: Once finished baking, let the casserole cool for about 5–10 minutes before slicing and serving.

By following these steps carefully, you’ll create a delicious Cauliflower Pizza Casserole that is sure to impress.