In small bowl, prepare fajita marinade: combine all ingredients. Place lamb in glass dish. Pour marinade over lamb, cover and refrigerate 4 to 6 hours. Grill over medium-hot coals. Cook lamb, onions, chilies and bell peppers 4 inches from coals. Cook steaks 5 to 6 minutes per side or to desired degree of doneness: 145 degrees F for medium-rare, 160 degrees F for medium or 170 degrees F for well. Turn vegetables frequently until cooked. Slice lamb steaks and vegetables into 1/4 inch thick slices. Serve on tortillas, top with salsa and roll up.