This classic sandwich gets a boost of herby brightness from the dill spread.
In a small bowl, combine mayonnaise, mustard, lemon juice, and dill. Season with salt and pepper; set dill spread aside.
Place cheese on both slices of bread; top with dill spread. Place ham and lettuce on one slice; top with other slice. Refrigerate, wrapped in parchment or waxed paper, up to overnight.