Let's cook.
In a medium bowl, combine the diced cooked turkey, dried cranberries, and finely diced celery.
In a small separate bowl, whisk together the mayonnaise, Dijon mustard, salt, and black pepper until smooth.
Pour the dressing over the turkey mixture and stir gently until all ingredients are well coated.
Lay out the four slices of whole wheat bread.
Divide the turkey salad mixture evenly between two slices of bread, spreading it to the edges.
Top each with a lettuce leaf, then place the remaining two slices of bread on top to complete the sandwiches.
Serve immediately or pack for later.
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