Preheat the oven to 375F. And prepare a 9x13 baking dish.

Boil up some water and add cauliflower florets to it. Cook for about 3 minutes until cauliflower has steamed. Drain and set aside in a large bowl.

In a large skillet, heat up olive oil to medium-high heat. Add the onion and sauté until translucent for about 5 minutes. Add minced garlic, and paprika and cook for another 1 minute.

Add in ground beef, salt, and black pepper. Break the meat apart and cook until it browns up for 5-7 minutes.

Stir in the tomato paste, oregano, and chopped tomatoes. Reduce the heat to medium-low and simmer for 15 minutes. Then, remove from the heat.

Pour the beef mixture over the steamed cauliflower and combine.

Take half of the cauliflower beef mixture and spread it in the baking dish. Top it up with 1 cup of ricotta cheese, 1 cup of mozzarella cheese, and ¼ cup parmesan cheese.

Top it up with the rest of the cauliflower mixture and then the remainder of the ricotta, mozzarella, and parmesan cheese.

Bake in the oven for 25 min and serve hot.