In a large saucepan over medium heat cook ground beef and onion until meat is browned and onion is tender, 5 to 7 minutes.

Stir in tomato sauce, kidney beans, stewed tomatoes with juices, diced tomatoes with green chiles, and cubed sweet potato. Add water to desired consistency.

Bring to a boil, then reduce heat to low. Cover and simmer 15 minutes.

Season with chili powder and garlic powder. Add salt and black pepper to taste. Makes 6 servings.