Dice chicken breast into bite-sized pieces.
Finely chop onion and green onion.
Heat olive oil in a pan and sauté the chicken breast.
When the chicken is half cooked, add onion and green onion and stir-fry together.
Season with salt and pepper.
Place chicken breast, onion, and green onion on top of rice.
Drizzle low-fat mayonnaise on top.