Place a rack in the center of your oven and preheat the oven to 400 degrees F. Cut the end off the spaghetti squash and slice in half. Scoop seeds out from the center. Drizzle with olive oil, sprinkle salt and pepper over the top. Place face down on a baking sheet and bake for 20 to 30 minutes. Remove from the oven and set aside to cool. Reduce the oven temperature to 350 degrees F.

Meanwhile, make the filling: Heat the two teaspoons of olive oil in a large, deep saucepan over medium heat. Add the ground turkey, all white parts, and half of the green pieces of the green onion, bell pepper, chili powder, garlic powder, smoked paprika, cumin, salt, and black pepper. Cook, breaking up the meat until it is no longer pink and the vegetables are tender for about 5 minutes. Stir in the black beans and fire-roasted tomatoes. Increase the heat to high and cook until the mixture is thickened and most of the tomato juice has cooked off about 5 minutes. Taste and adjust seasoning as desired. Stir in 1/2 cup of shredded cheese.