Steps

• 1

  Preheat the Traeger with the lid closed to 400°F; this will take about 15 minutes.

  400 ˚F / 204 ˚C

• 2

  Meanwhile, make the mustard butter: In a small bowl, combine the melted butter, mustard, Worcestershire sauce, and salt.

• 3

  Make the sliders: Keeping the rolls attached, use a long serrated knife to slice off the tops of all 12 rolls in one fell swoop; you will have one large top section and one large bottom section. Transfer the bottom section to a rimmed baking sheet and set the top section aside.

• 4

  Brush the cut side of the rolls with about half of the mustard butter. Arrange the ham over the bottom half and then cover the ham with the sliced cheese. Place the baking sheet directly on the grill grate and cook until the cheese is melted and the rolls begin to toast, about 10 minutes.

  400 ˚F / 204 ˚C

  00:10

• 5

  Meanwhile, combine the poppy seeds and dried minced onion in a small dish. Brush the top section of the rolls with the remaining mustard butter, then sprinkle evenly with the spice mixture.

• 6

  Working carefully so as not to disturb the spices, place the top section of rolls over the melted cheese. Return to the grill and cook until the tops are toasted, about another 10 minutes. Carefully transfer the sliders to a cutting board, cut into individual sliders, and serve. Enjoy!

  400 ˚F / 204 ˚C

  00:10