But how do you make a roast beef sandwich at home that tastes like it came straight from the deli? Tasting Table spoke with an expert — Ron Didner, the owner of Mookie's NY Deli — to find out.

Lean meats are nearly always the better choice for deli-style roast beef sandwiches, unless you like your sandwiches to be uncomfortably tough. Specifically, you might consider a round cut ...