Preheat oven to 350.
Slice open the slider buns and place the bottom halves in a baking dish.
Spread honey dijon mustard on the bottom halves. Top with a few slices of ham and cheese on each slider.
Place the top halves of the buns on top.
Drizzle the poppyseed dressing all over the tops of the buns and spread to cover them evenly.
Cover with foil, and bake for 12-15 minutes.
Remove foil and bake another 5 minutes.
Serve immediately and enjoy!