Cut the chicken breast into bite-sized pieces.
Slice the onion thinly.
Beat the eggs and prepare them.
Add olive oil to a pan and stir-fry the chicken breast.
When the chicken breast is halfway cooked, add the onion and stir-fry together.
Season with a little soy sauce, mirin, and stevia.
Pour the eggs over the ingredients, cover with a lid, and cook on low heat.
Place the cooked ingredients over rice to serve.