In a large bowl, put ground turkey, potato flakes ( other spices if desired) and starting with 1/4 cup salad dressing, mix together until it holds its shape and all the potato flakes are well mixed.Add the additional 1/4 cup salad dressing if needed.
Put the mixture in a pan; I use an 8x8-inch square pan.
Bake uncovered at 350°F until done, about 35 minutes.
(I sprinkle some paprika on the top before baking to add some color).