01 - Bring a large pot of generously salted water to a rolling boil. Cook 14 oz spaghetti or fettuccine until al dente, per package directions. Reserve 1/2 cup of the starchy pasta water before draining the pasta thoroughly.
02 - While the pasta cooks, prepare the maple bacon crumble. In a large skillet over medium heat, cook 6 slices of thick-cut bacon until rendered and crisp. Remove the cooked bacon to a plate lined with paper towels. Discard most of the bacon fat from the skillet, leaving behind a thin coating.
03 - Finely chop the cooked bacon. Return the chopped bacon to the skillet with 2 tbsp pure maple syrup and 1 tbsp brown sugar. Cook over medium heat, stirring constantly, for approximately 2 minutes until the bacon is caramelized and sticky. Set aside.
04 - In a mixing bowl, vigorously whisk together 3 large egg yolks, 1 large egg, 3/4 cup + 2 tbsp heavy cream, 3/4 cup unsweetened pumpkin purée, 2 oz grated Parmesan cheese, 1/2 tsp ground cinnamon, 1/4 tsp ground nutmeg, 1/4 tsp ground ginger, 1/8 tsp ground clove, and salt and freshly ground black pepper to taste, until a smooth, homogenous mixture is achieved.
05 - Return the drained hot pasta to the empty pot, ensuring it is off the heat. Immediately pour the pumpkin-egg mixture over the pasta, tossing rapidly with tongs or a pasta fork to ensure every strand is coated. Emulsify the sauce by adding a splash of the reserved pasta water as needed, until a silky, fluid consistency is achieved.
06 - Taste and adjust seasoning as necessary. Serve the Pumpkin Spice Carbonara immediately, generously topped with the prepared maple bacon crumble, extra grated Parmesan cheese, and chopped fresh parsley if desired.