1/3 cup mayonnaise  
2 tsp spiced mustard 
2 T chopped parsley 
1/2 tsp dried oregano 
1/8 tsp ground black pepper 
1/2 pound smoked turkey, sliced 
1/2 pound Swiss cheese, or 8 thin slices 
1/4 cup purple onion ~ thinly sliced
2 medium tomatoes ~ thinly sliced
8 slices rye bread 
Preheat oven to 350°. In a small bowl, combine mayonnaise, mustard, parsley, oregano and pepper; mix well. Place 4 slices of bread on cookie sheet and using half of the mayonnaise mixture spread  evenly on each slice. 
Layering your sandwiches, start with a slice of cheese, dividing evenly the turkey, onions and tomatoes. Bake 10 minutes. Spread the remaining mayonnaise on the remaining 4 slices of bread. Top each with a slice of cheese, then add them to the cookie sheet and bake 2 to 4 minutes more or until cheese is browned and bubbling. Remove from oven, flip the cheesy slice of bread onto your layered slice. 
Serve hot.  Enjoy Serves 4