01 -
Preheat the oven to 375°F (190°C). Lightly grease a medium baking dish and set aside.
02 -
Boil a large pot of salted water. Add pasta shells and cook according to package instructions until al dente. Drain and set aside to cool.
03 -
In a large bowl, combine pumpkin puree, shredded Gouda cheese, ricotta cheese, grated Parmesan cheese, garlic powder, nutmeg, and finely chopped sage. Mix thoroughly until the filling is uniform. Season to taste with salt and black pepper.
04 -
Using a spoon, fill each cooked pasta shell generously with the pumpkin and cheese mixture. Arrange stuffed shells in a single layer in the prepared baking dish.
05 -
Melt unsalted butter in a medium saucepan over medium heat until it develops a light golden color and a nutty aroma. Stir in the heavy cream with a pinch of salt and black pepper. Add extra finely chopped sage if desired. Simmer over low heat, stirring, until slightly thickened.
06 -
Pour the warm sauce evenly over the stuffed shells in the baking dish. Cover with foil and bake for 20 minutes. Remove foil and bake an additional 10 to 15 minutes until bubbling and golden.
07 -
For a crisp garnish, quickly fry whole sage leaves in a small skillet with butter or olive oil until crispy. Drain on paper towels.
08 -
Plate the stuffed shells with additional fried sage leaves if desired and serve immediately.