Preheat oven to 425°F (220°C).
Toss sweet potatoes, bell pepper, and onion with olive oil, cumin, chili powder, paprika, salt, and pepper in a large bowl.
Spread seasoned vegetables on a baking sheet and roast for 20-25 minutes until sweet potatoes are tender.
While vegetables roast, warm black beans in a pan over medium heat.
Warm tortillas in microwave or dry skillet.
Fill each tortilla with roasted vegetable mixture and black beans.
Add desired toppings like cheese, sour cream, cilantro, and lettuce.
Roll burritos tightly, tucking in sides as you roll.
Serve immediately with a squeeze of lime juice.