Follow these simple steps to create Ham and Havarti Cheese Sliders:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Baking Dish: Lightly grease a 9×13-inch baking dish.
3. Assemble the Rolls: Slice the slider rolls in half, keeping the tops attached. Place the bottom halves in the greased baking dish.
4. Layer the Ingredients: Lay one slice of ham on each roll. Top with a slice of Havarti cheese.
5. Create the Sauce: In a small bowl, mix together melted butter, Dijon mustard, garlic powder, onion powder, and chopped parsley if using.
6. Add the Sauce: Brush the sauce generously over the cheese and ham layers.
7. Cover with Tops: Place the top halves of the slider rolls on the cheese and ham layer.
8. Bake: Place the assembled sliders in the preheated oven and bake for 15-20 minutes, or until the cheese is melted and the tops are golden brown.
9. Cool and Slice: Once baked, allow sliders to cool slightly before slicing and serving.
10. Serve Warm: Enjoy your sliders warm for the best flavor experience.

These straightforward steps ensure you create a batch of mouthwatering sliders every time!