What makes for a disgusting food?

This week we visit a museum exhibit featuring foods that are inarguably revolting—or are they? Plus, a look at how formerly hippie foods like dense grain breads went mainstream. And meet hippie Jack: he has strong opinions about waffles, and he’s canvassing LA to see who makes the best one. Will Guidara talks hospitality lessons, and Evan pays her respects to the Jewish deli.