Cook Soup - Add onion, carrot, and celery to pot and cook, stirring, until onions are soft, about 5 minutes. Add curry powder and ground spices, mix to coat onions. Stir in diced sweet potato, apple, and tomato, then garlic and ginger. Add chicken thighs with juices, chicken broth, and coconut milk. Cook until potatoes are soft, around 1 hour.