. Prepare the Slider Spread:

• Mix mayonnaise and Dijon mustard in a small bowl. Set aside.

2. Toast the Rolls:

• Use a serrated knife to slice the rolls horizontally, separating the tops from the bottoms.
• Place the rolls cut side up on a baking sheet.
• Preheat the broiler to high and toast the rolls for 1-2 minutes until lightly golden. Watch carefully to prevent burning.

3. Assemble the Sliders:

• Preheat the oven to 350°F (reduce to 325°F for darker pans). Spray a baking dish with cooking spray.
• Place the bottom halves of the toasted rolls in the prepared dish. Spread half of the Dijon-mayo mixture on the rolls.
• Layer cheddar cheese, ham, and Swiss cheese on top.
• Spread the remaining Dijon-mayo mixture on the cut side of the top halves and place them over the Swiss cheese layer.

4. Prepare the Topping:

• In a small bowl, mix melted butter, Worcestershire sauce, poppy seeds, onion powder, and a pinch of salt.
• Pour the mixture over the sliders, using a basting brush to distribute it evenly over the tops and sides.

5. Bake the Sliders:

• Cover the dish with foil and let stand for 5 minutes.
• Bake for 20 minutes until the sliders are heated through and the cheese melts.
• Remove the foil and bake for an additional 5-10 minutes, until the tops are golden and crispy.

6. Serve:

• Let the sliders cool for a few minutes, then cut into individual servings. Serve hot with chips, fries, or your favorite sides.