It seems like the simplest thing in the world: Take a couple of slices of bread, put meat, cheese and other things between the two, and you’re done. And yet. Sandwiches are challenging. There are nuances, and if you don’t build a sandwich carefully, a potentially satisfying meal becomes terribly disappointing. Which is why we turned for advice to chef Craig Deihl. He considers sandwiches the “gateway drug” to cured meat consumption. Here, with assists from Bob Cook and our own video editor Randall Meehl as the bad sandwich maker, Deihl walks us through the dos and don’ts of making a sandwich.