Ingredients:

  • 12 slider rolls (Hawaiian rolls or similar soft rolls)
  • 1 lb (about 450g) Thinly Sliced Roast Beef (Deli style)
  • 8 slices (approx. 4 oz) Swiss Cheese
  • 1 cup Caramelized Onions (Optional)
  • 4 Tbsp (56 g) Unsalted Butter, melted
  • 1 tsp Garlic Powder
  • 1 tsp Dried Onion Flakes
  • 1/2 tsp Dried Thyme
  • 1 tsp Worcestershire Sauce (for topping)
  • 1 Tbsp Fresh Parsley, chopped (for garnish)
  • 3 cups High-Quality Beef Broth or Stock
  • 1 Tbsp Worcestershire Sauce (for jus)
  • Salt and Black Pepper, to taste

Instructions:

  1. Prepare the Au Jus: Combine 3 cups beef broth, 1 Tbsp Worcestershire sauce, and any soaked porcini mushrooms/liquid in a saucepan. Bring to a gentle simmer over medium heat and reduce for 10–15 minutes to deepen the flavour. Season lightly with salt and pepper. Keep warm.
  2. Preheat the oven to 350°F (175°C). Lightly grease a 9x13 inch baking dish.
  3. Slice the entire block of slider rolls horizontally, keeping the top and bottom halves as intact as possible. Place the bottom half in the prepared baking dish.
  4. Layer the filling evenly over the bottom buns: Half the Swiss cheese, all the roast beef (folding lightly), the caramelized onions (if using), and the remaining Swiss cheese.
  5. Place the top halves of the rolls securely on top of the filling.
  6. Make the Topping: In a small bowl, whisk together the 4 Tbsp melted butter, garlic powder, onion flakes, thyme, and 1 tsp Worcestershire sauce.
  7. Brush the entire surface of the top buns generously with the herb butter mixture.
  8. Bake for 15–20 minutes, or until the cheese is fully melted and bubbling, and the tops are golden brown and crisp.
  9. Remove from the oven, let rest for 5 minutes, then carefully slice the sliders apart with a sharp knife.
  10. Serve the French Dip Sliders immediately alongside small bowls of the hot Au Jus for dipping.