Created by KittenCal on December 5, 2011
Step 1: Squeeze out excess moisture from the tuna using your hands, then transfer to a medium bowl. Add in green onion, celery and apple; toss to combine.
Step 2: In another bowl whisk the mayo with Dijon mustard, curry powder and sweet relish (I suggest to start with 1/8 teaspoon curry powder and add in more to taste) add to the tuna mixture and mix to combine adjust the mayonnaise if needed.
Step 3: Season with salt and pepper. Cover and chill for at least 2 or more hours.
Step 4: Lightly toast the croissant halves, spread with soft butter if desired then top with a lettuce leaf. Top top each leaf with the tuna mixture , then a slice of cheese. Cover with remaining croissant half.