Creating these Roast Beef and Cheddar Sliders is simple when you follow these steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Baking Dish: Grease a baking dish or line it with parchment paper for easy cleanup.
3. Assemble the Bottom Layer: Slice the slider rolls in half and place the bottom halves in the prepared baking dish.
4. Layer the Roast Beef: Evenly distribute the sliced roast beef over the bottom halves of the rolls.
5. Add Cheese: Sprinkle the shredded cheddar cheese generously over the roast beef.
6. Prepare the Topping: In a small bowl, mix the melted butter, Worcestershire sauce, garlic powder, onion powder, salt, and pepper.
7. Brush the Mixture: Brush the butter mixture over the top halves of the slider rolls.
8. Cover and Bake: Place the top halves of the rolls on the assembled sliders. Cover the dish with aluminum foil and bake for 15 minutes.
9. Uncover and Finish Baking: Remove the foil and bake for an additional 5-10 minutes, or until the tops are golden brown and the cheese is melted.
10. Garnish and Serve: Remove from the oven, garnish with fresh parsley if desired, and slice into individual sliders.

These steps will guide you in creating this incredible dish effortlessly.