Preheat grill to 350° to 400° (medium-high). Rub chicken breasts evenly with 2 olive oil; sprinkle with salt and pepper. Cut a small slit at 1 end of each chicken breast; tuck end of 1 fresh herb sprig into each slit, laying sprigs over top of chicken. Grill chicken breasts, covered with grill lid, over 350° to 400° (medium-high) heat 6 to 7 minutes on each side or until done. If desired, remove and discard herb sprigs. Serve over fresh spinach.
Our top herb picks included fresh dill, basil, sage, rosemary, flat-leaf parsley, thyme, tarragon, and oregano.
Herbs will char a little because the sprigs will be next to the grate, but the result is a pretty and rustic look.