Preheat the oven to 425℉.
Place the cubed pumpkin, olive oil, garlic powder, paprika, nutmeg, thyme, 2 teaspoons of salt, and cracked pepper onto a baking sheet. Toss together so that the pumpkin is completely coated in all of the ingredients. Bake for 10 minutes, Toss and bake for an additional 10 minutes. Set aside.
While the pumpkin is baking, bring a large pot of salted water to a boil. Prepare the noodles according to package instructions, about 5 minutes. Drain the noodles and return to the pot.
Add the heavy cream to the noodles and turn the heat to low.
Add the cheeses to the noodles and stir until melted.
Remove from the heat and add the roasted pumpkin. Toss all the ingredients together and serve immediately.