Chilean Butternut Squash Casserole

This delicious casserole has become a tradition at my family's Thanksgiving. And everyone agrees we should make it more often, it's so good, and not hard to make. You can substitute mashed pumpkin or yams (unsweetened, of course!), but the butternut is best and worth the effort. A tip for easier clean up: I just mash the squash right in the casserole and mix everything there. I wipe off the upper sides wih a clean, damp dish towel and pop it in the oven. I've bee