In a large skillet, heat oil on medium.
Trim and tenderize chicken breasts, then lay flat in skillet to brown, about 5-7 minutes. Season with pink salt + ground pepper then flip.
Add mushrooms, tomatoes, kalamata olives, 1/2 squeezed lemon, and 2 lemon slices on chicken to cook in skillet another 5 minutes.
Once seared on either side, pour in water to finish cooking centre of chicken.