Bring a large pot of salted water to a boil. Cook the jumbo pasta shells according to package instructions until al dente. Drain and set aside.

Preheat the oven to 375°F (190°C).

In a mixing bowl, combine the pumpkin puree, ricotta cheese, half of the mozzarella cheese, cooked spicy sausage, Italian seasoning, salt, and black pepper. Mix until well combined.

Spread 1 cup of marinara sauce on the bottom of a baking dish.

Stuff each cooked pasta shell with the pumpkin and sausage filling and place them in the baking dish.

Pour the remaining marinara sauce over the stuffed shells and sprinkle with the remaining mozzarella and parmesan cheese.

Cover the baking dish with foil and bake in the preheated oven for 20 minutes.

Remove the foil and bake for an additional 10 minutes, or until the cheese is bubbly and golden.

Let the stuffed shells cool for a few minutes before serving. Enjoy!