For the pasta
01 -
1 lb (450 g) dried rigatoni
02 -
Kosher salt, for the pasta water
For the creamy tomato sauce
03 -
2 tablespoons unsalted butter
04 -
1 tablespoon olive oil
05 -
1 small yellow onion, finely diced
06 -
4 cloves garlic, minced
07 -
1/4 teaspoon red pepper flakes, optional
08 -
2 tablespoons tomato paste
09 -
1 can (28 oz / 795 g) crushed tomatoes
10 -
1 teaspoon kosher salt, plus more to taste
11 -
1/2 teaspoon black pepper
12 -
1/2 cup (120 ml) heavy cream
13 -
3/4 cup (75 g) freshly grated parmesan cheese, plus more for serving
14 -
1/2-1 cup reserved pasta water
15 -
1/4 cup chopped fresh basil or parsley