Slice the spaghetti squash in half and scoop the seeds out. Place the spaghetti squash halves face down on a sheet pan lined with parchment paper. Bake the squash at 425 degrees F until tender.
Heat a skillet on medium with olive oil. Add garlic and onion and sauté. Add carrot, celery and ground turkey and cook. Break up the turkey into small pieces as you are sautéing.
Next, pour in the marinara sauce, coconut milk and water to thin out the sauce. Reduce the heat and simmer. Sprinkle in garlic powder, Italian seasoning and salt and pepper to taste.
Once the spaghetti squash is cooked through, shred it with a fork. Evenly distribute the sauce into each shredded spaghetti squash boat. Sprinkle each with parmesan cheese and enjoy!