Root Vegetable Lasagna

This was delicious and both James and Todd LOVED it! It was very time consuming though and something that I would probably only make on the weekends.
Root Vegetable Lasagna from Cooking Light
Ingredients
6 cups (1/2-inch) cubed peeled butternut squash (about 2 1/2 pounds)
2 1/4 cups (1/2-inch) cubed peeled sweet potato (about 1 pound)
2 cups coarsely chopped onion, divided
1 tablespoon olive oil
Cooking spray
4 cups milk
1/8 teaspoon ground nutmeg
1/8 teaspoon ground cinnamon
1 bay leaf
1.5 ounces all-purpose flour (about 1/3 cup)
1/2 teaspoon salt
1/4 teaspoon freshly ground black pepper
1 1/4 cups (5 ounces) grated Parmesan
9 packaged no-boil lasagna noodles
1 1/2 cups (6 ounces) shredded part-skim mozzarella cheese

Preheat oven to 450°. Combine squash, potato, 1 cup chopped onion, and oil in a roasting pan coated with cooking spray, tossing to coat vegetables. Bake at 450° for 30 minutes or until vegetables are tender, stirring once; set aside. Combine remaining 1 cup onion, milk, nutmeg, cinnamon, and bay leaf in a medium saucepan over medium-high heat; bring to a simmer. Remove from heat; let stand 15 minutes. Strain milk mixture through a fine sieve over a bowl; discard solids. Return milk mixture to pan. Weigh or lightly spoon flour into a dry measuring cup; level with a knife. Add flour, salt, and pepper to milk mixture, stirring with a whisk. Cook over medium heat 10 minutes or until thick, stirring frequently with a whisk. Remove from heat; stir in Parmesan cheese.

Preheat oven to 375°. Spread 1/2 cup milk mixture in bottom of a 13 x 9–inch baking dish coated with cooking spray. Arrange 3 noodles over milk mixture; top with half of squash mixture, 1/2 cup mozzarella, and 1 cup milk mixture. Repeat layer with noodles, squash mixture, mozzarella, and milk mixture. Top with remaining 3 noodles. Spread remaining milk mixture over noodles, and sprinkle with remaining 1/2 cup mozzarella. Cover with foil coated with cooking spray. Bake at 375° for 30 minutes. Uncover and bake an additional 20 minutes. Let stand 10 minutes.