In a medium bowl, add 1/2 cup Parmesan cheese, 1 teaspoon salt and 1/4 teaspoon pepper to ricotta cheese and mix well. Set aside.
In mixing bowl, add remaining salt, pepper, and sage to squash. Beat for approximately 20-30 seconds until well blended.
Preheat oven to 400 degrees. Cover lasagna with foil, making sure the foil does not touch the cheese!