Is there a lamb dish that is as easy to prepare as steak?
You want the ones that look like little tiny T-bone steaks.  Typically they are called Lamb Chops, but look first as there are different cuts under that name.   You might also consider doing a rack, which is the equivalent to a Rib Roast, but obviously much smaller.  For the rack, I'd sear it in a pan, and then broil it until done. (15-25 minutes, 140-160 degrees).