Kashering from Meat to Dairy and vice versa

Rabbi Moshe Elefant is Chief Operating Officer of OU Kosher and the maggid shiur of the Orthodox Union’s Daf Yomi webcast (whose 1,800 learners a day around the globe make his lectures the most popular Daf in the world). For listeners of the popular Talkline With Zev Brenner radio program, Rabbi Elefant’s name has additionally become strongly ident...