Place baking paper over the chicken breast and give it gentle smacks with a rolling pin to flatten it out. Then divide the breast in two lengthwise so that it's not that big.
Sprinkle the chicken with salt and pepper on both sides and then press the sesame seeds on both sides to make them stick.
Preheat a pan to medium heat and add olive oil. Cook the chicken for 3 minutes on each side or until it's fully cooked but still juicy. When you place the chicken on the pan, don't move it around until it's time to flip it to prevent the seeds from unsticking.
Give it at least 5 minutes before slicing it to that the juices don't ooze out.