Toast the bread, on both sides, in a toaster or using a broiler.
On a clean surface, place the 3 slices of bread side-by-side. Spread mayonnaise on one side of each bread slice. Stack the following ingredients in order on the first slice of bread: lettuce, tomato, cheese, turkey and a slice of white bread. Repeat above sequence for the second layer. Finish by topping off with a slice of bread, mayonnaise side down.
Cut sandwich in quarters and add a toothpick in each to help hold it together. Place on a platter and enjoy!