Finely chop the onion, tomato, and bell pepper.
Cut the chicken breast into bite-sized pieces.
Heat olive oil in a pan and sauté the onion and chicken breast.
Add tomato, bell pepper, corn, and kidney beans, and stir-fry together.
Place the stir-fried ingredients and cheddar cheese on a tortilla.
Roll up the tortilla and grill it in the pan.