This turkey shepherd's pie is the perfect way to turn leftover turkey and mashed potatoes into a cozy, hearty meal. No need for an oven-safe skillet; just a baking dish and nonstick pan are all it takes. Using a frozen veggie mix to keep things easy, this recipe layers juicy turkey, savory veggies, and creamy mashed potatoes, all topped with a sprinkle of cheddar cheese. It's a warm, satisfying dish that's delicious for anyone craving classic comfort food.