Creating Ham and Havarti Cheese Sliders is a straightforward process if you follow these simple steps:

1. Preheat Your Oven: Preheat the oven to 350°F (175°C).
2. Prepare the Sliders: Slice the slider buns in half horizontally, keeping the tops and bottoms connected.
3. Layer the Ham and Cheese: Place a slice of ham on the bottom half of each bun, followed by a slice of Havarti cheese.
4. Make the Topping Mix: In a small bowl, combine the melted butter, Dijon mustard, Worcestershire sauce, brown sugar, garlic powder, onion powder, and black pepper. Mix well until combined.
5. Spread the Topping: Brush half of the butter mixture onto the cut side of the top half of the buns.
6. Assemble the Sliders: Place the top halves of the buns over the cheese-covered ham slices.
7. Brush the Sliders: Pour the remaining butter mixture over the assembled sliders, ensuring all tops are covered.
8. Wrap in Foil: Cover the entire tray with aluminum foil.
9. Bake: Place the sliders in the preheated oven and bake for 15-20 minutes, or until the cheese is melted and bubbly.
10. Serve: Remove from the oven, unwrap the foil, and let them cool slightly. Garnish with chopped parsley, if desired.

These steps will guide you in creating delicious Ham and Havarti Cheese Sliders that everyone will love.