Clean the chicken breast, onion, cherry tomatoes, and parsley thoroughly.
Boil the chicken breast in boiling water, then shred it into bite-sized pieces.
Thinly slice the onion.
Add olive oil to a pan and sauté the onion.
When the onion becomes translucent, add the shredded chicken breast and cherry tomatoes, and stir-fry together.
Season with soy sauce and pepper.
Turn off the heat and gently mix in the parsley.
Serve in a bowl.