1. Combine first 4 ingredients in a bowl. Add lamb, tossing to coat. Thread lamb onto 4 (6-inch) skewers, leaving space between pieces. Brush kabobs with jam mixture.
2. Prepare grill.
3. Coat grill rack with cooking spray; place on grill over medium-hot coals (350° to 400°). Place kabobs on rack; grill, covered, 3 to 4 minutes. Turn kabobs, and brush with jam mixture. Grill, covered, 3 to 4 additional minutes or to desired degree of doneness.