Step 1

Preheat oven to 425 F, and grease a 9-by-13 casserole dish.

Step 2

Toss the butternut squash cubes with 1 tablespoon olive oil, 1/2 teaspoon salt and 1/4 teaspoon black pepper.

Step 3

Arrange the squash on a baking sheet, and bake in the oven for 15-20 minutes, until soft and easily pierced with a fork.

Step 4

While the squash is cooking, cook the spinach. Heat the remaining tablespoon of olive oil in a large frying pan. When hot, add the spinach, and cook just until wilted.

Step 5

Add the garlic cloves and 1/4 teaspoon of salt to the pan, and stir. Set aside.

Step 6

Cook the jumbo pasta shells according to the package directions. Drain and set aside once cooked.

Step 7

Place the butternut squash in a large bowl, and mash slightly.

Step 8

Add ricotta cheese, egg, spinach, 1/4 teaspoon salt and the remaining 1/4 teaspoon of black pepper. Mix well.

Step 9

Spoon the butternut squash mixture into the cooked pasta shells, sprinkle with Parmesan cheese, and arrange them in the casserole dish.

Step 10

Place the shells into the oven and bake for about 20 minutes, until the filling is hot throughout and the Parmesan cheese has melted.

Step 11

Preheat oven to 425 F, and grease a 9-by-13 casserole dish.

Step 12

Toss the butternut squash cubes with 1 tablespoon olive oil, 1/2 teaspoon salt and 1/4 teaspoon black pepper.

Step 13

Arrange the squash on a baking sheet, and bake in the oven for 15-20 minutes, until soft and easily pierced with a fork.

Step 14

While the squash is cooking, cook the spinach. Heat the remaining tablespoon of olive oil in a large frying pan. When hot, add the spinach, and cook just until wilted.

Step 15

Add the garlic cloves and 1/4 teaspoon of salt to the pan, and stir. Set aside.

Step 16

Cook the jumbo pasta shells according to the package directions. Drain and set aside once cooked.

Step 17

Place the butternut squash in a large bowl, and mash slightly.

Step 18

Add ricotta cheese, egg, spinach, 1/4 teaspoon salt and the remaining 1/4 teaspoon of black pepper. Mix well.

Step 19

Spoon the butternut squash mixture into the cooked pasta shells, sprinkle with Parmesan cheese, and arrange them in the casserole dish.

Step 20

Place the shells into the oven and bake for about 20 minutes, until the filling is hot throughout and the Parmesan cheese has melted.