01 - 
                In a small saucepan, combine beef broth, soy sauce, Worcestershire sauce, Dijon mustard, and garlic powder. Bring to a simmer over medium heat, then reduce heat and keep warm.
              
              
              
                02 - 
                Preheat oven to 350°F (175°C). Place slider rolls on a baking sheet. Layer each roll with a slice of Swiss cheese and a portion of sliced roast beef.
              
              
              
                03 - 
                Brush melted butter over the tops of the rolls. Sprinkle with poppy seeds and dried parsley.
              
              
              
                04 - 
                Bake for 10-12 minutes, or until rolls are golden and cheese is melted.
              
              
              
                05 - 
                Serve warm sliders with the prepared au jus for dipping.