1Refrigerate artichokes. In shallow glass or plastic dish, mix reserved marinade and wine. Add chicken and bell peppers, turning to coat with marinade. Cover; refrigerate at least 30 minutes but no longer than 24 hours, turning occasionally.
2Heat gas or charcoal grill. Remove chicken and bell peppers from marinade; reserve marinade. Place chicken on grill over medium heat. Cover grill; cook 5 minutes. Turn chicken; add bell peppers to grill. Cover grill; cook 10 to 15 minutes or until peppers are tender and juice of chicken is clear when center of thickest part is cut (165°F).
3Strain marinade. In 1-quart saucepan, mix marinade, artichokes, onions and pepper. Heat to boiling; boil and stir 1 minute. Serve with chicken and bell peppers.