01 - Preheat oven to 425°F and line a baking sheet with parchment paper.
02 - In a large bowl, combine diced sweet potatoes, sliced onion, and chopped bell pepper with olive oil, cumin, smoked paprika, chili powder, coriander, salt, and black pepper. Toss to coat evenly.
03 - Spread the seasoned vegetables evenly on the prepared baking sheet and roast for 25 to 30 minutes, tossing halfway through, until tender and caramelized. Remove and allow to cool for 5 minutes.
04 - Warm black beans with minced garlic in a skillet over medium heat for 2 to 3 minutes, stirring occasionally until heated through.
05 - Heat tortillas in a dry skillet or microwave until pliable.
06 - Layer roasted vegetables, black beans, shredded cheese (if using), avocado slices, and sour cream or Greek yogurt onto each tortilla. Garnish with chopped cilantro.
07 - Fold the sides of each tortilla inward, then roll tightly to enclose the filling.
08 - Place burritos seam-side down in a skillet over medium heat and toast for 2 to 3 minutes per side until golden and crisp.
09 - Serve hot with lime wedges on the side.