Slice the beef
If needed, trim and slice the Skirt Steak very thinly against the grain. Aim for bite-size strips so they fry quickly and stay tender.
Coat and marinate
Place the sliced beef in a medium bowl. Add the Sesame Oil, Garlic Powder, Baking Soda, Kosher Salt, and White Or Black Pepper, then toss until every slice is lightly seasoned. Sprinkle in the Cornstarch and add the Water; mix thoroughly until the beef looks sticky and evenly coated rather than wet. Let it sit while you prepare the sauce and vegetables.
Mix the sauce
In a small bowl, stir together the Rice Vinegar, Oyster Sauce, Ketchup, Hoisin Sauce, Soy Sauce, Sugar, and the Chili Flakes if you want a little heat. Stir until the sugar is dissolved and the sauce looks smooth, then set it within reach of the stove.
Prep the vegetables
Dice the Red Bell Pepper and Onion into large, even pieces. Finely mince the Garlic Cloves and grate the Ginger. Keep the garlic and ginger together in a small pile so they can go into the pan at the same time.
Heat the oil
Pour enough Frying Oil into a large skillet or wok to shallow-fry the beef, usually about 1/4 to 1/2 inch deep. Heat the pan over medium-high until the oil reaches 350° F. The surface should shimmer, and a small drop of batter from the beef should sizzle right away.
Fry the beef
Carefully add the coated beef to the hot oil in batches, separating the slices with tongs or chopsticks so they do not stick together. Fry for 3 to 4 minutes, turning as needed, until the beef is cooked through and crisp around the edges with lightly browned spots. Transfer the fried beef to a rack or paper towel-lined plate.
Stir-fry vegetables
Carefully pour off all but 1 to 2 tablespoons of oil from the pan or wok. Add the diced onion and bell pepper and stir-fry for about 30 seconds, just until they begin to soften but still keep some crunch. Add the minced garlic and grated ginger, then cook for 30 seconds to 1 minute, stirring constantly, until fragrant and no longer raw.
Sauce and serve
Make a space in the center of the pan and pour in the reserved sauce. Let it bubble for about 30 seconds so it heats through and thickens slightly, then stir it into the vegetables. Return the fried beef to the pan and toss everything together until the meat and vegetables are evenly coated and glossy. Serve immediately while the beef is still crisp at the edges.


















