Leftover mashed potatoes are dressed up and transformed into a totally new dish, perfect for a weekday lunch or dinner. Courtesy of the Women’s Branch of the Orthodox Union.
Spray a nine-inch square or round baking pan with cooking spray.
Spread half of potatoes in pan.
In bowl, combine rest of ingredients, except cheddar cheese and remaining potatoes. Spread mixture over potatoes.
Put remaining potatoes over tuna. Sprinkle with cheese.
Bake at 350 degrees Fahrenheit about 35 minutes or until light browned.