Creating Spicy Pumpkin Pasta Bake is straightforward. Follow these steps for a delicious outcome:

1. Preheat Oven: Preheat your oven to 375°F (190°C) and lightly grease a large baking dish.
2. Cook Pasta: Boil a large pot of salted water. Add pasta and cook until al dente, according to package instructions. Drain and set aside.
3. Sauté Aromatics: In a skillet, heat olive oil over medium heat. Add chopped onion and sauté until soft, about 5 minutes. Stir in minced garlic and cook for another minute until fragrant.
4. Mix Sauce: In a mixing bowl, combine pumpkin puree, heavy cream, red pepper flakes, cinnamon, salt, and pepper. Stir until smooth.
5. Combine Ingredients: In the skillet with sautéed onions and garlic, add the cooked pasta and pumpkin sauce. Mix well to ensure pasta is evenly coated.
6. Layer in Baking Dish: Transfer half of the pasta mixture to the prepared baking dish. Sprinkle half of the mozzarella and Parmesan on top. Add the remaining pasta and top with the rest of the cheese.
7. Bake: Cover the dish with aluminum foil and bake for 20 minutes. Then, remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbly and golden.
8. Garnish: Once out of the oven, allow the dish to cool for a few minutes. Garnish with fresh parsley before serving.

This recipe ensures a delicious pasta bake that is bursting with flavors and perfect for those chilly evenings.