Start by sautéing the mushrooms in a skillet over medium heat. Add a drizzle of olive oil and let them cook until they are golden and soft. Sprinkle with garlic salt and black pepper to taste. This step is crucial for infusing the mushrooms with flavor, adding a savory element to your sandwich. You want them to be tender but not mushy. Once done, remove them from the skillet and set aside, allowing the flavors to deepen.
In the same skillet without cleaning it, pour in the beef broth. Bring it to a boil and let it reduce slightly for a few minutes. This step intensifies the flavors, resulting in a richer dipping sauce. Season it to taste, ensuring it’s flavorful enough for dipping. Once it’s ready, remove it from heat; this will become your delicious au jus.
Next, heat another pan over medium heat. Add a small pat of butter and allow it to melt. Once the butter is sizzling, take your hoagie rolls and cut them in half lengthwise. Place the cut sides down in the pan, and sauté them until they’re golden brown. This step will add a lovely crunch to your sandwich.
Once the rolls are toasted, it’s time to assemble. Divide the sautéed pastrami evenly among the four sandwiches. Make sure to pile it high; you want a full sandwich! Next, add the sautéed mushrooms on top of the pastrami. The combination of flavors is already making my mouth water.
Now, top each sandwich with the provolone cheese. If you’re using mozzarella, sprinkle it generously over the top. The cheese will melt beautifully in the oven, creating the perfect gooey texture.
Preheat your oven to 450°F (230°C). Place the assembled sandwiches on a baking sheet and bake for about 4 to 5 minutes, or until the cheese melts and the pastrami is heated through. Keep an eye on them; you want that beautiful golden cheese!
Finally, once they are out of the oven, serve each sandwich with a small ramekin of the au jus for dipping. This step is the cherry on top, allowing you to experience the full flavor with every bite. Enjoy your French Dip Pastrami Sandwich Recipe with a side of your favorite fries or salad for a complete meal!