To prepare a Biddy's Butternut Squash and Turkey Lasagna recipe, you'll first need to prepare the butternut squash. Cut the squash in half lengthwise and scoop out the seeds. Peel the skin and cut the flesh into 1/4-inch cubes. Place the cubed squash, skin-side down, in the bottom of an oven-proof lasagna dish. Top with the shredded turkey. Bake at 350? for 40 to 45 minutes, or until heated through. Remove from the oven and let stand for 10 minutes before serving.