A few nights ago I tried the lamb noodle soup at King of Noodles on Irving (@17th Avenue). It's a special listed on a paper on the wall, and I hadn't had it before.
The noodles were hand pulled and cooked perfectly, nice bite to them, but not too hard. Lamb was in boneless pieces, and despite some pieces that appeared gristly, everything was quite tender (even the gristly bits). I don't think I left a single lamb bit uneaten. The soup also contained some vegetables (bok choi, iirc) and a pretty plain broth, which would be my main complaint. I added a bit of the chile sauce, which helped, but if they had a richer lamb broth, or something with more interesting spices, this dish would go from good to amazing.