Combine preserves, vinegar, oil, garlic, salt, and pepper in a small bowl.
Fig Balsamic-Glazed Beef Kabobs
Allow thawed tips to come to room temperature on the counter over about 20 minutes.
Meanwhile, soak bamboo skewers in water for 10 minutes, then remove and drain.
Thread tips and 3 onion pieces onto skewer, evenly alternating; repeat for the next 3 skewers, then brush kabobs evenly with prepared fig balsamic glaze.
Heat grill to medium and add kabobs. Grill uncovered about 7 to 9 minutes for a medium-rare to medium doneness of 130-145 degrees Fahrenheit, as per a meat thermometer, turning and basting with sauce every 2 minutes. See the Omaha Steaks Steak Doneness Guide if you prefer a different level of doneness.