mix mayonnaise, sweet and spicy mustard, horseradish, honey and apple cider vinegar and reserve
mix melted butter with poppy seeds, chopped dried onion, Worcestershire sauce and yellow mustard and set aside
split dinner rolls in half without separating into individual rolls
spread both sides with horseradish mustard mixture
spread onion slices evenly over bottom of bread then
evenly layer ham in the bottom of the rolls
top with the cheese then finally the tops of the dinner rolls
place the completed sliders in a piece of heavy duty aluminum foil big enough to seal the sliders inside
spoon the butter mixture over the tops of the rolls making sure to evenly cover with the onion and poppy seed
seal the foil around the sliders and refrigerate at least 30 minutes or overnight.
preheat oven to 325
place foil package in the middle rack of the preheated oven for 15 minutes then open foil to expose the tops and continue baking for 10 more minutes or until golden brown
the bottom crusts will crisp and be a little tough to cut through
Recipe by Man of Leisure.info at https://manofleisure.info/honey-ham-sliders/