1 medium-large sweet potato, peeled and diced
1 large onion, diced
4 cloves garlic, minced
2 tablespoons chili powder
4 teaspoons ground cumin
½ teaspoon ground chipotle chile (or smoked paprika)
¼ teaspoon salt
2½ cups water
2 15-ounce cans black beans, rinsed
1 14-ounce can diced tomatoes (or tomatoes with chiles)
4 teaspoons lime juice
optional toppings:
chopped fresh cilantro
sour cream (for non-vegans)
Heat oil in a Dutch oven over medium-high heat. Add sweet potato and onion and cook, stirring often, until the onion begins to soften, about 4 minutes. Add garlic, chili powder, cumin, chipotle or smoked paprika and salt and cook, stirring constantly, for 30 seconds. Add water and bring to a simmer. Cover, reduce heat to maintain a gentle simmer and cook until the sweet potato is tender, 10 to 12 minutes. (I actually cooked it for much longer – like an hour.)
Add beans, tomatoes and lime juice; increase heat to high and return to a simmer, stirring often. Reduce heat and simmer until slightly reduced, about 5 minutes.