I've not seen this anywhere, I just made it up. But a piece of pork tenderloin, quickly grilled and sliced with some dill pickles that I made the other week, is a perfect simple combo.
1 pork tenderloin, cut into 8 slices and flattened slightly with the palm of your hand
Salt and freshly ground black pepper
A little vegetable or corn oil
As much dill pickle or sliced gherkin as you wish
4 soft baps or ciabatta rolls
Heat a ribbed griddle pan, season the pork and grill them for 2-3 minutes on each side, keeping them nice and pink. Warm the bread and cut in half and fill with the dill pickles and pork, as well as dill mustard if you wish.