Balsamic-Glazed Pork Sandwiches
You can roast the pork tenderloin up to a day ahead of time; let cool, then cover and refrigerate. Slice the pork just before you are ready to assemble the sandwiches. Red onions are sweeter than most yellow onions, but they can still be strong. For a milder taste, soak the onion slices in cold water for about ten minutes, then drain and pat dry before placing them on the sandwiches.