"Forgo your diet" for a "cholesterol high" at these "real-deal" kosher delis, which "bring back memories" with their "super-size sandwiches" and other "belt-busting" classics; despite "minimal" decor, "variable" service and "sticker shock", they're "a keeper" – just pack a "shoehorn to fit" into the Murray Hill digs (the UES site's roomier).