How to Make It
Preheat oven to 375°F. Toss sweet potatoes with oil, chili powder, and ￼¾ teaspoon each salt and pepper. Spread out on 2 parchment-lined baking sheets. Roast, stirring halfway through, until most potatoes are browned at the tips, 35 to 40 minutes. Let cool completely.
Meanwhile, combine tomatoes, onion, corn, cilantro, lime juice, and ½ teaspoon each salt and pepper in a medium bowl. Set aside for 15 minutes. Strain, discarding any liquid that has accumulated.
Toss beans with remaining ¼ teaspoon each salt and pepper.
Divide beans, cheese, corn salsa, and sweet potatoes evenly among tortillas. Roll into burritos, wrap each separately in foil, and freeze in a single layer. Freeze for up to 3 months. To heat, remove foil, wrap each burrito in a paper towel, and microwave on high until heated through, 3 to 5 minutes.