Combine the olive oil, lemon zest, lemon juice, rosemary, garlic, and lots of black pepper together in a sealable, zipper-style plastic bag or mixing bowl.
Add the chicken breasts to the marinade and let them marinate for 30 minutes to 4 hours, refrigerated.
Preheat the grill until hot (when you hold your hand 1 to 2" above the grill grates, you want to pull it away after 2 or 3 seconds). Place the grill plate(s) in the BBQ Grill Pan. Preheat the pan for 2 to 3 minutes.
When the pan is ready, remove the chicken from the marinade, shaking off any excess marinade. Place on the grill plate. Grill for 6 to 8 minutes per side, seasoning with salt as you grill. The chicken should be firm to the touch and have an internal temperature of 165°F when cooked through. Use the other side of the pan to cook vegetables using the perforated plate if you like.
QVC is not responsible for the availability, content, security, policies, or practices of the above referenced third-party linked sites, nor liable for statements, claims, opinions, or representations contained therein. QVC's Privacy Statement does not apply to these third-party web sites.