1 ¼poundskirt or flank steak, thinly sliced against the grain
2tablespoonsWorcestershire sauce, divided
½teaspoonsalt, divided
Freshly ground black pepper
8ouncescremini or button mushrooms, sliced
1medium yellow onion, chopped
1green bell pepper, seeded and chopped
2tablespoonsvegetable oil, divided
8slicesprovolone cheese
12crunchy corn taco shells, warmed
Instructions
Season steak and veggies:
Put the steak slices in a medium bowl and season with 1 tablespoon of the Worcestershire sauce, ¼ teaspoon of the salt, and a few grinds of black pepper. Stir to coat the beef.
In a large bowl, combine the mushrooms, onion, and bell pepper. Season with the remaining 1 tablespoon Worcestershire, remaining ¼ teaspoon salt, and a few grinds of black pepper. Stir to combine.
Cook the steak:
In a large cast-iron skillet, heat 1 tablespoon of the oil over medium heat. Add the steak and cook for 6 to 9 minutes, flipping the pieces to cook evenly. Transfer the steak to a plate and cover with another plate to keep warm.
Cook the veggies:
Add the remaining 1 tablespoon oil to the skillet. Add the onion and bell pepper and cook, stirring frequently, for about 5 minutes. Add the mushrooms and cook for an additional 2 minutes, or until tender. Return the steak to the skillet and heat through for 2 minutes. Remove the pan from the heat.
Make it cheesy:
Lay the provolone cheese slices over the beef and vegetable mixture and allow it to melt.
Assemble:
Fill the taco shells with the cheesy skillet mixture and stir.