1 container part-skim ricotta
4 oz. part-skim mozzarella
tsp. freshly grated or ground nutmeg
1/4 c. grated Parmesan
2 tbsp. grated Parmesan
Kosher salt and pepper
1 bunch spinach, thick stems discarded
1 package frozen winter squash purée
6 no-boil lasagna noodles
Green salad, for serving
Heat oven to 425°F. In a large bowl, combine the ricotta, mozzarella, nutmeg, 1/4 cup Parmesan, 1/2 tsp salt and 1/4 tsp pepper; fold in the spinach.
Spread 1/2 cup of the squash on the bottom of an 8-in. square baking dish. Top with 2 noodles and spread a third (about 1/4 cup) of the remaining squash over the top. Dollop with a third (about 1 cup) of the ricotta mixture; repeat. Place the remaining 2 noodles on top; spread with the remaining squash and dollop with the remaining ricotta mixture.
Sprinkle with the remaining 2 Tbsp Parmesan, cover tightly with an oiled piece of foil (to prevent sticking) and bake for 15 minutes. Uncover and bake until the noodles are tender and the top is golden brown, 8 to 10 minutes.
Source: "Country Living" https://www.countryliving.com/food-drinks/recipes/a32905/winter-squash-lasagna-recipe-125153