1. Place the lamb cubes and onion in a large pan. In a bowl, combine jam, balsamic vinegar, rosemary, garlic, red wine vinegar, oil, salt and pepper; pour over the lamb and onions. Toss to coat. Cover, refrigerate and marinate 4-8 hr.
2. Remove meat from marinade and discard marinade. On each skewer, thread 4 lamb cubes alternating with onion pieces.
3. Grill the kabobs about 4 min. per side or to desired degree of doneness. When lamb is done, remove from grill, cover and let stand.
4. Grill peaches cut-side down until browned and juicy. Cut each grilled peach in half again and place on the end of each skewer. Serve immediately.
* Recipe and image provided by the American Lamb Board