Preheat your oven to 375°F (190°C).
In a large skillet, sauté the onion and garlic until translucent.
Add the ground turkey to the skillet, cooking until browned.
Stir in the butternut squash, spinach, and dried sage, cooking for about 5 minutes.
Add the quinoa and chicken broth; bring to a boil, then reduce heat.
Cover and simmer for 20 minutes, or until quinoa and squash are tender.
Taste and season with salt and pepper according to preference.
Transfer to a baking dish, sprinkle cheese on top, and bake for 15 minutes.