Cut the chicken breast into bite-sized pieces.
Marinate the chicken breast with soy sauce, minced garlic, and pepper for 10 minutes.
Drizzle olive oil in a pan and preheat over medium-low heat.
Place the marinated chicken in the pan and cook until both sides are golden brown.
Pour the remaining marinade over the chicken and simmer until the sauce thickens.
Transfer to a plate and serve.