Serve this healthy side dish with our Grilled Chicken Tostadas.
Heat oil in a medium skillet over medium heat. Add shallots and the chile; cook, stirring frequently, until tender, about 5 minutes. Transfer to a large bowl; add beans, lime juice, cumin, and cayenne pepper. Toss well to combine. Season with salt and black pepper. Serve warm or at room temperature, with lime wedges on the side.