Mini Cauliflower Pizzas

Name: Mini Cauliflower Pizzas
Ingredients: 1/2 medium head cauliflower, cut into florets; 2 tablespoons grated Parmesan; 1/2 teaspoon Italian seasoning; Pinch kosher salt; 1 large egg; 1 cup freshly grated mozzarella; Nonstick cooking spray, for spraying the parchment; 1/4 cup Creamy Tomato Sauce, recipe follows; 1/2 cup halved cherry tomatoes; Fresh basil leaves, for garnish; 2 tablespoons butter; 2 tablespoons olive oil; 2 cloves garlic, minced; 1 small onion, finely chopped; One 14-ounce can tomato puree; 1/4 cup heavy cream; 1/4 teaspoon kosher salt; 1 generous pinch red pepper flakes; Pinch of freshly ground black pepper