Ingredients

1 large butternut squash

6 tablespoons olive oil, divided

3 red onions, medium, julienned

1 pound part-skim ricotta cheese

2 tablespoons rosemary, chopped

2 eggs

1 1/2 cups grated Parmesan cheese, divided

3 tablespoons unsalted butter

Scant 1/2 cup all-purpose flour

3 1/2 cups whole milk

Pinch nutmeg

1 bag chopped frozen spinach (1-pound), defrosted and drained

6 sheets fresh pasta, or no-boil lasagna noodles

Salt

Pepper