In a large Dutch oven, melt 2 tablespoons of unsalted butter over medium heat. Once melted, add the diced onion and soften it for about 5 minutes, stirring occasionally. When the onion is translucent, stir in 2 cloves of minced garlic and cook for an additional 30 seconds until fragrant.

Next, add in 1 cup of pumpkin puree, 1 cup of whole milk, and 2 cups of chicken broth to the pot. Along with this mixture, stir in 1 tablespoon of Dijon mustard, 1 teaspoon of salt, ½ teaspoon of black pepper, 1 teaspoon of smoked paprika, and a pinch of ground nutmeg. Mix everything smoothly together, creating a luscious base for your Pumpkin Mac and Cheese.

Incorporate 8 ounces of elbow macaroni into the creamy mixture, ensuring the pasta is well-covered with the sauce. Bring the contents to a gentle boil, then reduce the heat to a simmer. Cover the pot and let it cook for 10-12 minutes, stirring occasionally, until the macaroni is tender, and the liquid is mostly absorbed.

Once the pasta has reached the desired tenderness, lower the heat to the lowest setting. Gradually stir in 1 cup of sharp cheddar cheese, ½ cup of mozzarella cheese, and ½ cup of grated Parmesan cheese. Continue stirring until all the cheese is completely melted and seamlessly blended into the creamy pumpkin sauce.

Finally, remove your pot from heat and sprinkle the Pumpkin Mac and Cheese with freshly chopped parsley. Serve hot in cozy bowls, letting the creamy, cheesy goodness warm you from the inside out.