Cut the chicken breast into bite-sized pieces.
Mix Greek yogurt, olive oil, lemon juice, garlic, oregano, salt, and pepper in a bowl.
Marinate the chicken breast in the mixture for at least 30 minutes.
Add olive oil to a pan and preheat over medium heat.
Cook the marinated chicken breasts in the pan until golden brown on both sides.
Serve with herbs or salad as desired.