Ingredient:

• 2 pounds orange-fleshed sweet potatoes, peeled and cut into cubes
• ½ teaspoon ground dried chipotle pepper
• ½ teaspoon salt
• 2 tablespoons olive oil, divided
• 1 onion, diced
• 4 cloves garlic, minced
• 1 red bell pepper, diced
• 1 jalapeno pepper, sliced
• 2 tablespoons ancho chile powder, or to taste
• 1 tablespoon ground cumin
• ¼ teaspoon dried oregano
• 1 (28 ounce) can diced tomatoes
• 1 cup water, or more as needed
• 1 tablespoon cornmeal
• 1 teaspoon salt, or to taste
• 1 teaspoon white sugar
• 1 teaspoon unsweetened cocoa powder
• 2 (15 ounce) cans black beans, rinsed and drained
• 1 pinch cayenne pepper, or to taste
• ½ cup sour cream, for garnish (Optional)
• ¼ cup chopped fresh cilantro, for garnish (Optional)