In a large pot of boiling salted water, cook the cauliflower florets until tender, about 5 minutes. Drain well.
In a mixing bowl, combine the cooked cauliflower, mozzarella cheese, Parmesan cheese, tomato sauce, minced garlic, Italian seasoning, olive oil, salt, and pepper. Mix well.
Transfer the mixture to a baking dish and spread it out evenly.
Bake in the preheated oven until the top is golden and bubbly, about 30-35 minutes.
Let it cool for a few minutes before serving. Enjoy!
Notes:
This casserole is a great way to enjoy cauliflower with an Italian twist.