Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2                    boneless chicken breast
                        - skin on is best -- but
                        - skinless will work
   2      tablespoons   mayonnaise
   2      teaspoons     spicy mustard
                        juice of one lime
                        coarsely ground pepper to taste

Preparation:

Mix the last four ingredients together, and smear liberally over the chicken breast. Allow the chicken to sit in the mixture for about an hour if possible. Preheat the grill on medium-high for about 10 minutes. Place chicken breast, skin side down on grill. Cook until chicken is about half done (maybe 6 minutes). Turn, and baste skin side of chicken with any marinade remaining in the pan. Continue cooking until chicken is done.