Ingredients

• 1 pound sweet potatoes, peeled and cut into 3/4-inch cubes
• 3 tablespoons olive oil, divided
• ½ teaspoon ground cumin, or more to taste
• ¼ teaspoon red pepper flakes (optional)
• coarse salt and ground black pepper to taste
• 2 tablespoons freshly squeezed lime juice
• 1 (14.5 ounce) can black beans, rinsed and drained
• ½ red onion, finely chopped
• ½ cup chopped fresh cilantro