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Prepare the Szechuan Dip Sauce: In a dry skillet over medium heat, toast the Szechuan peppercorns and black peppercorns for 2-3 minutes, until fragrant. Let cool slightly, then grind them into a fine powder using a spice grinder or mortar and pestle.

In a small bowl, combine the ground peppercorns, mayonnaise, sesame oil, rice vinegar, chili garlic sauce, honey, and garlic powder. Mix well until smooth. Taste and adjust seasoning if needed. Set aside.

Marinate the beef: In a medium bowl, combine the thinly sliced flank steak with soy sauce, cornstarch, and MSG (if using). Toss to coat evenly. Let marinate at room temperature for 30 minutes.

Cook the beef: Heat vegetable oil in a large skillet or wok over medium-high heat. Add the marinated beef in batches, if necessary, to avoid overcrowding the pan. Cook for 2-3 minutes per side, until browned and cooked through. Remove beef from the skillet and set aside.

Prepare the au jus: In the same skillet, add the minced garlic and grated ginger. Sauté for 1 minute until fragrant. Pour in the beef broth and bring to a simmer, scraping up any browned bits from the bottom of the pan. Reduce heat to low and keep warm.

Assemble the sandwiches: Preheat your oven to 350°F (175°C). Slice the hoagie rolls lengthwise, without cutting all the way through. If desired, place a slice of provolone cheese inside each roll.

Divide the cooked beef among the rolls. Place the open-faced sandwiches on a baking sheet and toast in the preheated oven for 3-5 minutes, or until the rolls are lightly toasted and the cheese (if using) is melted.

Serve immediately: Garnish the sandwiches with fresh chopped cilantro. Serve with the warm Szechuan au jus for dipping and a generous dollop of the Szechuan Dip Sauce on the side.


Prepare the Szechuan Dip Sauce: In a dry skillet over medium heat, toast the Szechuan peppercorns and black peppercorns for 2-3 minutes, until fragrant. Let cool slightly, then grind them into a fine powder using a spice grinder or mortar and pestle.

In a small bowl, combine the ground peppercorns, mayonnaise, sesame oil, rice vinegar, chili garlic sauce, honey, and garlic powder. Mix well until smooth. Taste and adjust seasoning if needed. Set aside.

Marinate the beef: In a medium bowl, combine the thinly sliced flank steak with soy sauce, cornstarch, and MSG (if using). Toss to coat evenly. Let marinate at room temperature for 30 minutes.

Cook the beef: Heat vegetable oil in a large skillet or wok over medium-high heat. Add the marinated beef in batches, if necessary, to avoid overcrowding the pan. Cook for 2-3 minutes per side, until browned and cooked through. Remove beef from the skillet and set aside.

Prepare the au jus: In the same skillet, add the minced garlic and grated ginger. Sauté for 1 minute until fragrant. Pour in the beef broth and bring to a simmer, scraping up any browned bits from the bottom of the pan. Reduce heat to low and keep warm.

Assemble the sandwiches: Preheat your oven to 350°F (175°C). Slice the hoagie rolls lengthwise, without cutting all the way through. If desired, place a slice of provolone cheese inside each roll.

Divide the cooked beef among the rolls. Place the open-faced sandwiches on a baking sheet and toast in the preheated oven for 3-5 minutes, or until the rolls are lightly toasted and the cheese (if using) is melted.

Serve immediately: Garnish the sandwiches with fresh chopped cilantro. Serve with the warm Szechuan au jus for dipping and a generous dollop of the Szechuan Dip Sauce on the side.
