In a 3-quart saucepan, heat oil over medium-high heat. Add onion and garlic. Cook, stirring occasionally, 3 to 5 minutes until onion is translucent. Add tomatoes, red pepper flakes, and basil; bring to a boil over high heat. Reduce heat to low, cover, and simmer 5 minutes to blend flavors.
Stir in heavy cream, parsley, 3 tablespoons grated cheese, and vodka. Cook until heated through. Keep warm.
Place pasta on a platter and top with sauce and remaining cheese.
Video
Notes
Nutrition information is an estimate, calculated automatically. Values vary with brands, substitutions and portion sizes.