Step 1

Preheat oven to 400°F; line a baking sheet with foil. Prick sweet potatoes a few times with a fork and rub skins with oil; season with a pinch each of salt, pepper, and cinnamon.

Step 2

Place sweet potatoes directly on the oven rack, with prepared pan placed on a lower rack to catch any drips. Bake until sweet potatoes are very tender, about 1 hour.

Step 3

Meanwhile, stir together black beans, 2 teaspoons oil, and 1/4 teaspoon cinnamon; season to taste. Slash open potatoes and season insides to taste. Divide bean mixture and avocado between potatoes. Serve hot, with crème fraîche, toasted sesame seeds, and a generous pinch of cinnamon.