For the chicken: Mix together the olive oil, lemon zest and juice, cilantro, parsley, rosemary, thyme, oregano, salt, pepper and garlic in a 1-gallon ziptop bag. Add the chicken and massage the marinade into the meat until evenly coated. Seal the bag and place in the refrigerator. Let the chicken marinate at least 2 hours.
For the apple, celery and snap pea slaw: In a small bowl, combine the olive oil, lemon juice, vinegar and agave. Season with salt and pepper.
In a large bowl, combine the peas, cilantro, apples, celery, jalapeno and onion. Add the vinaigrette to the bowl and toss. Cover and refrigerate for about 30 minutes.
Preheat a grill to high heat. Dip a wad of paper towels lightly in vegetable oil and, using tongs, carefully rub over the grates several times until glossy and coated. Grill the chicken until cooked through, 2 to 3 minutes per side.
Serve the chicken with the slaw.
I bought the chicken breast pieces already trimmed. They were pretty thin, so there was no need for pounding.