White Spinach Pizza

Name: White Spinach Pizza
Ingredients: 1 pound store-bought or homemade pizza dough; 1 small bunch fresh basil; 1 clove garlic; 8 ounces low-moisture part-skim or whole-milk mozzarella cheese, shredded (about 2 cups); 1/2 ounce Parmesan cheese (1/4 cup firmly packed freshly grated or 1/4 cup store-bought grated); 1 cup whole-milk ricotta cheese (about 8 ounces); 2 tablespoons heavy cream; 1 teaspoon kosher salt, divided; 1/2 teaspoon freshly ground black pepper, divided; 1 pinch red pepper flakes; 4 ounces baby spinach (about 4 packed cups); 2 tablespoons olive oil; All-purpose flour, for dusting