Hawaiian sweet rolls layered with deli ham and Swiss cheese, topped with a butter, Dijon, poppy seed and onion mixture and baked covered, then uncovered, at 350°F.
The total includes a 5-minute stand before baking. To make ahead, refrigerate the assembled sliders and the butter topping separately for up to 1 day.
Keyword baked ham and cheese sliders, ham and cheese sliders, ham and Swiss party sliders, hawaiian ham and swiss sliders, Hawaiian roll ham sliders