01 - Fill a large pot with water and season generously with salt. Bring to a boil. Add the penne or rigatoni and cook according to package directions until just al dente. Reserve 1/2 cup pasta water, then drain the pasta.
02 - While the pasta cooks, heat olive oil in a large skillet over medium heat. Add the finely diced onion and cook for 3 to 4 minutes until softened, stirring occasionally.
03 - Stir in the minced garlic and red chili flakes. Cook for 1 minute, allowing the mixture to become fragrant.
04 - Pour in the crushed tomatoes. Simmer the mixture for 5 minutes, stirring occasionally to prevent sticking.
05 - Stir in the vodka and cook for 2 to 3 minutes so the alcohol reduces while the sauce thickens slightly.
06 - Lower the heat and add the heavy cream and grated parmesan. Stir constantly until the sauce is creamy and smooth. Season with salt and black pepper to taste.
07 - Add the drained pasta to the skillet. Toss well to coat, adding reserved pasta water little by little until the sauce reaches desired consistency.
08 - Plate immediately, garnishing with fresh basil and extra parmesan as desired. Serve hot.