0 Arrange the bottoms of the sweet Hawaiian rolls in tight rolls of three in a lightly greased 9x13 baking dish.
1 Spread Dijon mustard and mayonnaise across the bottom half of the rolls.
7 Add a layer of overlapping ham slices.
2 Add a layer of Swiss cheese slices. Cut the Swiss cheese slices in half and overlap the cheese across the ham layer.
8 Melt butter in the microwave. Stir salt, pepper, and onion powder into the melted butter.
3 Replace the tops of the rolls. Use a silicone basting brush to spread the butter mixture over the slider tops.
4 Sprinkle parsley and poppy seeds over the tops of the sliders.
5 Bake at 350 degrees Fahrenheit for 20 minutes, until the tops of the buns are golden brown.
6 Slice the sliders apart using a serrated knife and serve them hot.
