Pretty easy
Start with a skin-on breast, if possible, sear the skin side in some oil, roughly 2-3 minutes in a hot pan or until it is a dark golden color, flip and transfer to a sheet tray and put it in the over, 350 degrees for roughly 5-7 minutes.
Ideally, you should have a nice thermometer, like the thermoworks RT600c, where you can quickly check the temperature without much damage to the meat.
You want the internal temp to 163 degrees. Let it rest for 2-3 minutes, it will carry over to 165 degrees and reabsorb the juices into the muscle fibers
Season however you want, or put a sauce on top, voila, perfect breast
Me, I did this on a competitive level, so many done exactly like that