vodka pasta recipe

ngredients: 12 ounces pasta (such as penne or rigatoni) 2 tablespoons olive oil 1 small onion, finely chopped 3 cloves garlic, minced 1/2 teaspoon red pepper flakes (optional, for heat) 1/2 cup vodka 1 can (28 ounces) crushed tomatoes 1/2 cup heavy cream 1/2 cup grated Parmesan cheese Salt and pepper, to taste