What is the side dish under the lamb shanks? is there a recipe for that?

Not sure. From the photo, because they are round, guessing Israeli couscous (which is actually a very small pasta) and cranberry or some red fruit.
You could make that, or another rice or grain to give some starchy heft to the plate and absorb the lamb jus.
One recipe among many good ones:
https://www.thespruceeats.com/israeli-couscous-dried-cranberries-2121633