Cut the chicken breast into bite-sized pieces.
Julienne the vegetables such as onion and bell pepper.
Heat olive oil in a pan and grill the chicken breast.
When the chicken breast is cooked, add the vegetables and stir-fry together.
Place the cooked chicken breast, vegetables, and cheese on the tortilla.
Roll up the tortilla and grill it in the pan.
Slice into bite-sized pieces and serve on a plate.