1. Brown ground turkey in a medium skillet until cooked through. Add ground turkey to a 6 quart slow cooker. 2. Add the onion, peppers, tomato sauce, diced tomatoes, beans, jalapeños, corn, chili powder, cumin, and garlic powder to the slow cooker. Stir to combine and season with salt and pepper.3. Cover and cook on High for 4 hours or low for 6 hours.