In a skillet, heat oil, and saute potatoes until they are golden. Remove from pan.
Add black beans to a pot and heat.
Add rinsed & drained chicken to the pan with taco seasoning and 1 tbsp of water. Cook until heated.
Prepare corn casserole in the microwave per directions. Once done, combine black beans and corn casserole.
Assemble tortillas with chicken, potatoes, and corn/black bean mix. Top with Shredded Cheese, sour cream, lettuce, sauce, etc.