Mel's Black Bean Burritos

2 sweet potatoes, peeled and cubed small (about 3-4 cups) 
1 jalapeno, seeded and finely diced 
1 red pepper, diced small 
1 small red onion, diced small (about 1/2 cup) 
1 teaspoon olive oil 
1 teaspoon cumin 
1 teaspoon chili powder 
1/2 teaspoon salt 
1/4 teaspoon black pepper 
1 (15 ounce) can black beans, rinsed and drain 
1/4 - 1/2 cup chopped cilantro (depending on your taste) 
2 teaspoons fresh lime juice (from about 1 lime)

Preheat oven to 425F.  In a large bowl, toss together the sweet potatoes, jalapeno, red pepper, and red onion with evoo, cumin, chili powder, salt and pepper.  Dump onto a baking sheet and roast for about 20 minutes, tossing halfway through.  The vegetables should be tender but not mushy.  Serve mixture alone, or rolled in a ww tortilla.