01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - Wash sweet potatoes and prick each several times with a fork. Bake directly on the oven rack or prepared baking sheet for 40–50 minutes, until tender. Let cool slightly.
03 - Slice each sweet potato in half lengthwise. Carefully scoop out most of the flesh, leaving a ¼-inch border to support the skins. Reserve the flesh for another use.
04 - Brush the insides of the potato skins with olive oil and place skin-side down on the baking sheet. Bake for 10 minutes to crisp up.
05 - Meanwhile, in a bowl, combine black beans, red onion, bell pepper, jalapeño, cilantro, cumin, smoked paprika, chili powder, salt, and pepper. Mix well.
06 - Fill each potato skin with the black bean mixture. Top with shredded cheddar and Monterey Jack cheese.
07 - Return to the oven and bake for 8–10 minutes, until cheese is melted and bubbly.
08 - Remove from oven. Top with sour cream (or Greek yogurt), avocado, green onions, and fresh cilantro. Serve with lime wedges.