On one slice of bread lay a slice of cheese, the ham, another slice cheese, the turkey and the last slice of cheese. Top with other slice of bread. In a wide flat bowl or pie plate, mix the egg, milk, vanilla, and a dash of salt and pepper. Preheat a frying pan or griddle surface with the butter or non stick spray over medium heat. Dip sandwiches into egg mixture and quickly place into pan. Cook till egg is set and turn to cook other side. Place on a warm plate and sprinkle with powdered sugar. Serve preserves on the side.