In a large skillet, heat the olive oil over medium to medium-high heat. Add the ground turkey and heat through, stirring frequently, until evenly cooked, Add the onion, carrots, and celery and continue stirring and cooking until the onions are just barely translucent.
Place the turkey-vegetable mixture in a slow cooker. Add the tomatoes, vegetable broth, quinoa, and spices and stir to combine. Cook on low heat for 5 to 8 hours. Serve warm, garnished with grated cheddar cheese and cilantro. Serves 6 to 8.