1. Bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Reserve 1 cup of pasta water and then drain the pasta.
2. In a large skillet, heat olive oil over medium heat. Add minced garlic and sauté until fragrant, about 1 minute, taking care not to burn it.
3. Stir in the pumpkin puree and cook for another 2 minutes, allowing the flavors to meld.
4. Slowly add the heavy cream, stirring continuously to create a smooth sauce. Bring the mixture to a gentle simmer.
5. Add the grated Parmesan cheese, nutmeg, salt, and pepper. Stir until the cheese is melted and the sauce is creamy. If the sauce is too thick, add reserved pasta water a little at a time until you reach the desired consistency.
6. Add the cooked pasta to the skillet, tossing it gently to coat evenly with the sauce.
7. Remove from heat and garnish with fresh parsley and, if desired, a sprinkle of red pepper flakes for an extra kick.

My abuela taught me that the key to a good sauce is patience. Letting the flavors develop slowly is what makes this dish so special. Remember, cooking is about feeling, not just following instructions.