Pastrami Sliders are hot, melty, and packed with deli flavor—Russian dressing, Havarti, pastrami, Swiss, and pickles baked on soft slider buns with buttery poppy seed tops.
Preheat the oven to 350℉. Line a large baking tray or 9x13-inch casserole dish with foil and spray the bottom with cooking spray.
As one unit, slice the rolls in half horizontally. Place the bottom half of rolls on the prepared tray.
Spread the Russian dressing out onto the rolls. Arrange the Havarti slices on top, then arrange the pastrami slices on the Havarti, then arrange the Swiss cheese on the pastrami, and finally arrange the pickle slices on top of the Swiss. Place the top half of rolls on top.
In a small bowl, mix together the melted butter, poppy seeds, and onion powder, and brush on top of the rolls.
Cover the rolls with foil and bake until they’re warm throughout and the cheese is melted, about 20 minutes. If needed, remove the foil and broil after baking to brown the tops. Serve warm.
Notes
Cover with foil while baking so the sliders heat evenly and the cheese melts without over-browning the tops.
For extra golden tops, broil briefly at the end (watch closely!).
Leftovers reheat best in the oven so the buns stay soft but not soggy.
Thousand Island or Creamy French dressing may be substituted for the Russian dressing, if needed.