Dice oinon and saute in oil about 5 minutes
Peel and dice sweet potato and optional carrot. Add to onion. Coat with oil and saute 2 minutes. Add optional corn and 1/4 cup water and bring to a simmer. Cover and cook 15 minutes
Dice chicken breast
Rinse and drain balck beans.
Add salsa, chicken and black beans to vegetables.
Heat through, evaporating excess water as necessary.
Spoon mixture onto whole wheat wrap, top with cheese and roll. up wrap as burritto.
Top with sour cream