Tuna Pie with Potato Topping is a delicious and comforting dish that combines the flavors of tuna and creamy mashed potatoes. The pie filling is made with canned tuna, onions, and a creamy sauce, while the topping is a layer of fluffy mashed potatoes. Baked until golden and crispy, this pie is perfect for a cozy dinner or a potluck gathering. Serve it with a side salad for a complete meal.