Heat oil in a large, heavy pot over medium heat. Add meat and cook until browned, about 10 minutes, stirring often. Add garlic, chili powder, oregano, cumin, and salt and stir well. Add 6 cups of the water and bring to a boil; reduce heat to medium-low, cover, and simmer 1 to 1 1/2 hours or until meat is tender, adding more water if needed.
Combine cornmeal and 1/2 cup of the water and mix well; stir into chili. Cook, uncovered, 30 minutes longer or to desired consistency, stirring often to prevent lumping and adding more water if needed.
Stir in TABASCO® Chipotle Sauce and check seasoning. If desired, top with sour cream, cheese, onion, and additional TABASCO® Chipotle Sauce.
Makes 6 to 8 servings.