Preheat oven to 450 degrees F and adjust rack to middle position. While it warms, brush the squash lightly with olive oil and dust with nutmeg. Place squash, cut-side up, on a baking sheet. Roast for 25 minutes.

Meanwhile, heat 1 Tbsp. oil in a large saute pan over medium heat. Brown the ground turkey. Add the diced onion, garlic, and celery, stirring frequently for 5-7 minutes until soft.

Stir in herbs, spices, and raisins. Add spinach and wilt 2-3 minutes. Add in butter or coconut oil and combine over medium heat.

Spoon filling into acorn squash and roast for 20 minutes. Drizzle with balsamic vinegar and serve.