Preheat the oven to 400. Pierce cleaned sweet potatoes with a fork 5-6 times. Wrap in foil and bake in the oven for 30-35 minutes or until medium firmness {you don't want them as soft as you would for mashed sweet potatoes}. Remove from oven and take off foil to let cool.

Slice potatoes lengthwise down the middle. Scoop out the middle and cut into small chunks.

In a small bowl, mix sweet potato chunks, black beans, corn, cilantro and lime juice together. Spoon into sweet potato halves and top with cheddar cheese. Bake in the oven for 5-6 minutes or until cheese is melted. Top with sour cream and serve.