If you are not using a lean cut of lamb, you could have flare-ups on the grill. If this happens while you are grilling, simply turn off one of the burners, and set the skewers over the extinguished side of the grill. Close the lid and allow the kabobs to finish cooking using indirect heat. For a charcoal grill, move the skewers to the edges of the grill grate, over a section with no charcoal below.