Spicy Dry-Fried Beef

Cut the beef with the grain into 2-inch-wide strips. Cut each strip across the grain into 1/4-inch-thick slices, then stack the beef slices and cut across the grain into 2-inch-long matchsticks.
Heat a 14-inch flat-bottomed wok over high heat until a bead of water vaporizes within 1 to 2 seconds of contact. Swirl in 1 tablespoon of the peanut oil, add the carrots, celery, and chilies, then, using a metal spatula, stir-fry 1 minute or until the vegetables have absorbed all of the oil. Transfer the vegetables to a plate.
Swirl the remaining 2 tablespoons peanut oil into the wok, carefully add the beef, and spread it evenly in one layer in the wok. Cook undisturbed 1 minute, letting the beef begin to sear. Then stir-fry 1 minute, or until the beef starts to foam and release its juices. Continue stir-frying 2 to 3 minutes or until almost all the liquid has evaporated and the oil begins to sizzle. Reduce the heat to medium and continue stir-frying 3 minutes until the beef is well browned, all the liquid has disappeared, and the wok is almost dry. Swirl the soy sauce into the wok and stir-fry 30 seconds or until well combined. Add the ginger and garlic and stir-fry 10 seconds or until the aromatics are fragrant. Add the carrot mixture and stir-fry 30 seconds or until well combined. Add the sesame oil and scallions and sprinkle on the salt and pepper.