In a large Dutch oven, heat the oil over medium-high heat. Add the onion, sweet potato, jalapeño, and a pinch of kosher salt, and sauté until the onion has softened and the sweet potato is barely tender, about 8 minutes. Add the garlic and cumin, and cook until fragrant, about 1 minute.
Add the stock, enchilada sauce, and green chiles. Increase the heat to high and bring the mixture to a boil, stirring occasionally.
Stir in the quinoa, cover, and reduce the heat to low. Cook until the quinoa is soft, about 15 minutes.
Add the turkey, black beans, roasted red pepper, and cheese. Cook until the cheese has melted and the turkey has warmed through, about 5 minutes. Season to taste with Kosher salt and freshly ground black pepper.
Serve with avocado, tortilla strips or chips, sliced jalapeño, cilantro, and Mexican crema or sour cream. Enjoy!