Spicy Grilled Chicken

Spicy Grilled ChickenKatie (Katiedid) from Taste of Home
3/4 cup finely chopped onion
1/2 cup grapefruit juice
2 tablespoons olive oil
2 tablespoons soy sauce
1 tablespoon honey
1 garlic clove, minced
1-1/2 teaspoons salt
1-1/2 teaspoons rubbed sage
1-1/2 teaspoons dried thyme
1 teaspoon ground allspice
1 teaspoon garlic powder
1/2 teaspoon ground cinnamon
1/2 teaspoon ground nutmeg
1/4 teaspoon cayenne pepper
1/4 teaspoon pepper
6 boneless skinless chicken breast halves

In a large resealable plastic bag or shallow glass container, combine the first 15 ingredients; mix well. Reserve 1/3 cup for basting and refrigerate. Add chicken to remaining marinade and turn to coat. Seal bag or cover the container; refrigerate overnight. Drain and discard marinade. Grill chicken, uncovered, over medium heat for 3 minutes on each side. Baste with reserved marinade. Continue grilling for 6-8 minutes or until juices run clear, basting and turning several times. Yield: 6 servings.