How to Make It
In a medium bowl, mix the squash and nutmeg. In a second bowl, combine the ricotta, spinach, ½ teaspoon salt, and ¼ teaspoon pepper.
In the bottom of a 5- to 6-quart slow cooker, spread ½ cup of the squash mixture. Top with 3 of the lasagna noodles (breaking to fit), half the remaining squash mixture, 3 lasagna noodles, and half the ricotta mixture; repeat, ending with the ricotta mixture. Sprinkle with the mozzarella.
Cook on low, covered, until the noodles are tender, 3 to 4 hours. Serve with the green salad, if desired.