01 -
Boil the rigatoni pasta in salted water until al dente. Drain the pasta and set it aside.
02 -
In a large skillet, saute the onion and garlic in butter over medium heat until soft.
03 -
Whisk in the pumpkin puree, chicken broth, heavy cream, sour cream, nutmeg, salt, and black pepper into the skillet.
04 -
Simmer the pumpkin sauce for 10 minutes, stirring occasionally.
05 -
Stir the cooked pasta into the pumpkin sauce, simmering for 2-3 minutes more until thickened.
06 -
Garnish with Parmesan cheese and parsley before serving, if desired.