1. Preheat grill to medium-high heat.
2. Combine all ingredients except lamb in a large zip-top plastic bag. Add lamb to bag; seal and marinate in refrigerator 30 minutes.
3. Remove lamb from bag; discard marinade. Thread lamb pieces evenly onto 12 (10-inch) skewers. Grill 2 minutes on each side or until desired degree of doneness.