To oven-grill chicken breasts, begin by preheating your oven to 450F. Season the chicken with salt and pepper and, if desired, lightly coat them with olive oil. Heat a grill pan or oven-safe skillet on the stovetop and sear the chicken for approximately 2-3 minutes per side. Then, transfer the pan to the preheated oven and cook the chicken for 15-20 minutes until the internal temperature reaches 165F. Allow the chicken to rest briefly before serving.