We also loved these kabobs with pork tenderloin and plums in place of steak and peaches.
Soak wooden skewers in water to cover 30 minutes.
Preheat grill to 350° to 400° (medium-high) heat. Thread steak and next 3 ingredients alternately onto skewers, leaving a 1/4-inch space between pieces. Sprinkle kabobs with seasoned salt and pepper. Stir together molasses and vinegar.
Grill kabobs, covered with grill lid, 4 minutes on each side. Baste with half of molasses mixture, and grill 2 minutes. Turn, baste with remaining half of molasses mixture, and grill 2 more minutes or until done.
Instead of peaches, used pineapple chunks...added bell peppers and used cherry tomatoes instead. It was great!