- Use a large pot or Dutch oven to heat olive oil over low heat. Add sweet potato and onion. Cook for about 5 minutes until the onion begins to soften, stirring often, about 5 minutes. Add garlic, chili powder, cumin, oregano, salt and pepper. Keep stirring for about 30 seconds while the spices heat up.
- Add water, beans and tomatoes. Stir again. Turn heat to high and bring to a simmer. When the pot starts bubbling, reduce heat to low and cook until the sweet potato is tender, about 20 minutes. Stir every few minutes to avoid burning on the bottom.
Serve with sour cream, cheese, fresh cilantro and limes or jalepeño slices.