Sprinkle an even layer of mozzarella cheese onto half of the slices of bread. Toast all of the bread lightly, just until cheese is melty but the bread is still soft in the middle.

Spread honey mustard on the cheesy slices of bread, and spread thousand island dressing on the naked slices of bread. Layer on the sandwich ingredients in the order you prefer — I like to put the turkey on one slice of bread, and stack all of the vegetables on the other slice, sprinkling sunflower seeds over the top of the vegetables. Top with a grind or two of black pepper if desired.

Assemble the sandwiches, slice in half on the diagonal, and serve.