Preheat oven to 425 degrees F. Line a baking sheet with parchment paper or a silicone baking mat; set aside.To make the cauliflower crust, add cauliflower to the bowl of a food processor and pulse until finely ground, yielding about 2-3 cups.*Transfer to a microwave-safe bowl. Cover loosely and place into microwave for 4-5 minutes, or until softened; let cool.Using a clean dish towel or cheese cloth, drain cauliflower completely, removing as much water as possible.Transfer cauliflower to a large bowl. Stir in eggs, mozzarella, Parmesan and Italian seasoning; season with salt and pepper, to taste.Spread cauliflower mixture into a 15- by 10-inch rectangle onto the prepared baking sheet. Spray lightly with nonstick spray and bake for 12-15 minutes, or until golden.Top with pizza sauce, cheeses and pepperoni minis. Place into oven and bake until the cheese has melted, about 3-5 minutes.Serve immediately, sprinkled with basil and red pepper flakes, if desired.