Cut cucumber and chicken breast into bite-sized pieces.
Chop the onion finely.
Heat olive oil in a pan and stir-fry the chicken breast.
When the chicken breast is half cooked, add the onion and stir-fry.
Add the cucumber and give it a quick stir-fry.
Add rice, mixing well with all the ingredients.
Season with salt and pepper.
Serve the finished cucumber chicken breast rice in a bowl.