(The following devar Torah is from Rabbi Label Lam shlita)
Many years ago, when I was still a single Yeshiva Bochur, I was given the privileged assignment to give a ride to a very great person. It was motzei Shabbos, and a prominent Torah family I knew was having a bar mitzvah. I was asked to pick up Rabbi Moshe Neuschlas from New Square. I went with a friend of mine and we arrived at the elderly Rabbi’s modest home. He answered the door and we expected him to come right away outside but he beckoned us in instead. We could not refuse his offer.
He seated us at the dining room table and generously presented each of us with a piece of hot and delicious looking potato kugel. As he was putting the kugel down, he was explaining to us the YICHUS, the historicity and import of this kugel. As part of its spiritual ingredients, this holy kugel contained shirayim, leftovers, or traces of kugel that had been eaten from a series of big Rebbes