Heat a skillet over medium heat. Add the ground turkey, onion, and garlic. Cook until the turkey is browned and the onion softens, about 5 to 7 minutes. Drain any excess liquid.
Transfer the turkey mixture to the slow cooker. Add the sweet potatoes, red bell pepper, kidney beans, diced tomatoes, chicken broth, chili powder, cumin, salt, and black pepper.
Stir everything together until the spices are evenly distributed.
Cover and cook on low for 6 to 7 hours, until the sweet potatoes are tender.
Ladle into bowls and top with fresh cilantro before serving.