Juicy ham and sliced cheese baked in soft brioche buns and topped with a buttery mustard, onion, and poppy seed sauce. Quick, easy, and a family-favourite!
Spoon the mixture over the tops of the sliders. Bake, covered, for 15 minutes or until the cheese has melted. Uncover and bake for an additional 5 - 10 minutes until the buns are lightly browned.