Preheat oven to 350F degrees. Spray the bottom of a 9x13 baking dish with cooking spray.

Slice the sheet of Hawaiian rolls in half crosswise and place the bottom half into the baking dish.

Add 6 slices of cheddar cheese onto the bottom layer of rolls.

Layer the roast beef across the top of the cheese.

Drizzle the BBQ Sauce across the top of the roast beef.

Place the remaining cheddar cheese slices across the top of the roast beef.

Place the top bun layer back onto the sliders.

Mix together the melted butter, Worcestershire, Dijon mustard, minced dried onion and poppy seeds. Generously brush across the tops of the slider buns.

Cover the baking dish with foil and bake in the oven for 15 minutes, or until the sliders are warmed through and the cheese is melted.

Remove foil and bake for another 3-5 minutes to brown the tops of the sliders.

Garnish with fresh minced parsley and serve immediately.