Preheat oven to 400°F.Clean the outside of the squash - I use a little vinegar and rinse with water.
Carefully cut the squash in half as best as you can. I added detailed steps above in the post for the best way to cut it.Remove the seeds and poke a few holes in the skin with a fork.
Pour enough water in your baking dish so you have about 1 to 1½ inches of water on the bottom.
Place the squash halves skin side down into the dish and place a tablespoon of butter inside each one where the seeds were. Sprinkle with the cinnamon, nutmeg and turmeric all over. The amount is estimated, sprinkle desired amount over the squash.
Cover and bake for 20 minutes. Remove foil/cover and bake until the flesh of the squash is fork tender (or desired level of tenderness), about 10-20 minutes longer.
You can eat it out of the skin or cut up to serve. Discard skin.
Notes
We use this as a vegetable side so it is 4 servings for us. It will not be 4 servings if you are not serving it with foods.We pour the melted butter from the squash into a small bowl. Then we cut the halves in half again and serve with the butter in a bowl so we can add the butter on our squash as we want.Turmeric does taste good on this but if you don't like turmeric, be creative and use your favorite spices. The skin does not soften when cooking so be sure to check the flesh to see if it is done, not through the skin.