Place all 12 Hawaiian rolls onto a surface suitable for cutting. Using a serrated knife, slice in half while keeping tops and bottoms intact. It should be like one large sandwich.
Place the bottom layer of rolls in a 9x13 pan.
Slather mayonnaise on the bottom slab of Hawaiian rolls.
Evenly layer the cheese, ham and pickles over Hawaiian roll bottoms. Place the tops back on.
In a small bowl, combine unsalted butter, Dijon mustard, garlic powder, Worcestershire sauce and fine sea salt. Place in the microwave until butter has melted, approximately 40 seconds.
Pour over the tops of the rolls, trying to get as much on top as you can.
Cover with aluminum foil and bake for 20 minutes.
Remove aluminum foil and continue to bake until tops are slightly browned and cheese has melted.
Remove, cut into 12 individual sliders and serve hot.
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