01 -
Bring a large pot of salted water to a boil. Cook jumbo pasta shells according to package directions until al dente, about 9–11 minutes. Drain and rinse under cold water to halt further cooking.
02 -
Arrange drained shells in a single layer on a clean kitchen towel to prevent sticking.
03 -
Set oven to 375°F (190°C) to preheat.
04 -
In a mixing bowl, stir together pumpkin puree, ricotta cheese, 1/2 cup shredded mozzarella, parmesan cheese, garlic powder, sage, nutmeg, egg, salt, and pepper until fully combined and creamy.
05 -
Pour 1 cup marinara or tomato sauce over the bottom of a 9x13-inch baking dish.
06 -
Using a spoon or piping bag, fill each pasta shell generously with pumpkin ricotta mixture. Arrange filled shells snugly in the prepared dish over the sauce.
07 -
Spoon remaining marinara sauce evenly over the shells. Sprinkle with remaining 1/2 cup shredded mozzarella cheese.
08 -
Lightly drizzle olive oil across the top for richness.
09 -
Cover the baking dish with foil and bake for 25 minutes.
10 -
Uncover dish and continue baking 10 minutes, until cheese is melted and golden.
11 -
Let shells rest for 5 minutes. Garnish with fresh parsley or sage if desired. Serve warm.