Preheat oven to 350°F.
Lightly grease a 9x13 baking dish with cooking spray; set aside.
Cut the Hawaiian Rolls, lengthwise; you should have two big pieces.
In a mixing bowl, combine mustard, mayonnaise, and honey; whisk until incorporated. Set aside 2 tablespoons of the honey mustard mixture.
Brush remaining mixture on each side of the rolls.
Place the bottom roll in previously prepared baking sheet, then top with half of the turkey slices, Swiss cheese and the rest of the turkey.
Place the other half of the rolls on top.
Mix together the melted butter and reserved honey-mustard mixture.
Brush it on top of the rolls and on the sides.
Bake in the oven for 15 minutes, or until cheese is melted.
Remove from oven and serve warm.