in a medium bowl stir together all marinade ingredients. add the chicken, toss to coat. Cover and chill for 30 minutes.
while the chicken is marinating, combine all salsaingredients in a bowl and toss to combine. Optional: combine in a blender orfood processor and give it a few pulses. Chill until ready to use.
Use tongs to transfer chicken to a preheated grill or skillet over medium heat (discard marinade) and cook for 6-8 minutes on each side until cooked through.
If you have large chicken breasts, rather than pounded them to 1/2 inch thickness you can slice them in half lengthwise