These apple-walnut turkey sandwiches are a delicious and satisfying option for a quick and easy lunch or dinner. The combination of tender turkey, crisp apples, and crunchy walnuts creates a perfect balance of flavors and textures. The sandwiches are layered with creamy mayonnaise and tangy Dijon mustard, adding a zesty kick. Serve these sandwiches on your favorite bread or rolls for a hearty and nutritious meal.