Stir-fry chicken breast, crushed peperoncino, and olive oil together with tomato and egg.
Cut the chicken breast into bite-sized pieces.
Dice the tomato.
Slice the onion thinly.
Drizzle olive oil in a pan.
Stir-fry the chicken breast over medium-low heat.
Once the chicken breast is cooked, add tomato and onion and stir-fry together.
Season with salt and pepper.
Transfer to a plate and serve.