Most people say a sandwich is filling stuffed between two layers of bread. But what about hotdogs, or a loaded pocket of pita bread? Lan, Bryan, Nik, and Lidey get into a heated debate about what exactly defines a sandwich on this week’s episode of In the Test Kitchen.  Recipes Eaten in episode: Italian Sub Diner-Style Sheet-Pan Tuna Melts Ultimate Grilled Vegetable Sandwich Learn more about your ad choices. Visit megaphone.fm/adchoices