At June, we have a few rules for how to keep this classic sandwich interesting and updated: add a variety of texture and balance those flavors! Use solid white tuna and drain it well--less water from the tuna means you can add moisture with other ingredients. Sweet, crisp apple, crunchy celery and zesty Dijon are just a few of the players that give this salad the right balance of flavors and make the finished product shine. This makes 2 full sandwiches; you may not need to use all the tuna salad if you prefer less or your bread slices are on the small side.