These are some of the most popular international versions of the open-faced sandwich. An elegant format that provides more surface area and looks much better.

Heat oil in a medium Dutch oven or other heavy pot over medium. Add onions and cook, stirring, until just beginning to turn golden brown, 10–14 minutes. Stir in the canned refried beans and mix ...

However — recognizing that my biases are squarely in the driver’s seat here — only one of them serves: Speaking purely for myself, when I think of what defines an excellent sandwich ...