Cook the pasta until it’s al dente (follow the package instructions) and then drain. Don’t overcook it, as it will keep cooking in the oven!
Preheat your oven to 375°F.
In a large baking dish, combine the cooked pasta, marinara sauce, heavy cream, peas, olive oil, salt, crushed red pepper, garlic, and Parmesan cheese.
Stir everything well, ensuring the pasta is thoroughly coated with the mixture.
Bake in the oven for 20-22 minutes or until the cheese has melted. Sprinkle extra Parmesan on top if you like.
Serve it up warm and enjoy your delicious and easy peasy rigatoni!