Preheat pan over medium-high heat and oven to 400°F.
Season chicken with salt, pepper, and rosemary.
Sear chicken with a weighted skillet for 5 minutes.
Flip, press again, and cook until done. 165°F internally, measured with an instant-read thermometer.
Rest 10 minutes before slicing.
Video
Notes
Technique: Weighted cooking ensures even browning and moisture retention. Flavor Tips: Swap rosemary for other woody herbs. Storage: Refrigerate up to 4 days or freeze whole breasts.