The Cuban sandwich at Cuba de Ayer is the rare sandwich that makes me want to look past a menu.
Roasted pork, ham, a mild cheese and just enough pickle to pick it up. Cuba de Ayer presses the sandwich perfectly -- just enough to crisp the edges, but nothing greasy at all. The bread stays crunchy, and the sandwich has a perfect mix of meat, salt and creamy cheese.
The real measure of Cuba de Ayer is that we don't share main courses at the Burtonsville restaurant. We ordered two sandwiches and polished them both off. We did share a side dish of "maduros" plantains and a dessert of tres leches cake.
(As Steve points out in a comment below, you shouldn't look past Cuba de Ayer's menu. They have delicious food, as I sketched out in the original post about the restaurant. I just looked past on the most-recent visit because I was infatuated with the idea of a Cuban sandwich.)
If you're looking for sandwiches worth a drive, everything starts at Bon Fresco. You can also check out pit beef at Pioneer or the bulgogi panini at Riverside Coffee. (And per Marcia's comment below, check out the pit turkey and other barbecue at the Town Grill in Lisbon.) We really do need a place to serve Vietnamese bahn mi.