For the marinade, combine all ingredients in a blender and puree for two minutes on medium speed. Strain marinade through a fine sieve. Let chicken breasts sit in marinade, refrigerated, overnight. The following day, on a hot grill, grill the marinated chicken until thoroughly cooked, about 10 to 12 minutes depending on the thickness of the chicken.
For the salsa, in a large mixing bowl, combine all ingredients and it's ready to serve.
For the presentation, spoon a serving of the salsa on the plate. Cut the grilled chicken breast on an angle and fan out on plate next to salsa.
Recipe courtesy of Jane Butel