Bring a large pot of salted water to a boil. Cook the penne pasta according to package instructions until al dente. Drain and set aside.
In a large skillet, heat olive oil over medium heat. Add the Italian sausage, breaking it up with a spoon, and cook until browned and fully cooked, about 7 minutes.
Add the minced garlic and red pepper flakes to the skillet and cook for 1-2 minutes until fragrant.
Pour in the heavy cream and bring to a gentle simmer. Add the Parmesan cheese and stir until the sauce thickens, about 3-4 minutes.
Add the cooked pasta to the skillet and toss to coat with the creamy sausage sauce. Season with salt and black pepper to taste.
Garnish with chopped fresh parsley and serve immediately.
Notes
This pasta recipe pairs well with a crisp green salad and garlic bread for a complete meal.