This Chinese dish is from the Mandarin style of cooking and is therefore not spicy. If you like spicy food add hot sauce to taste.
1 1/2 pounds pork tenderloin
1/4 teaspoon black pepper
1 1/4 teaspoons kosher salt, divided
3 tablespoons peanut oil, divided
1/2 pound bok choy, cut into 1-inch pieces (about 3 cups)
3 carrots, sliced thin on the diagonal
1 sweet onion, quartered and layers separated
2 celery stalks, sliced thin on the diagonal
1 tablespoon minced peeled fresh ginger
2 garlic cloves, minced
2 scallions, sliced
Hot cooked Jasmine rice
1 tablespoon cornstarch
1 cup chicken broth
1/4 cup fresh orange juice
2 tablespoons soy sauce
1 teaspoon sesame oil
Remove any silverskin from the pork. Cut pork into thin 1-inch-long pieces. Season with pepper and salt.
Heat 1 tablespoon of the oil in a large skillet or wok over high. Add half of the pork; cook, stirring, until browned, 2 to 3 minutes. Remove from skillet. Repeat with 1 tablespoon of the oil and remaining pork.
Heat the remaining 1 tablespoon oil in the skillet. Add bok choy, carrots, celery, onion, remaining salt, ginger, and garlic; cook, stirring, until vegetables are tender-crisp, 5 to 6 minutes.
Whisk together the cornstarch and the remaining sauce ingredients in a bowl. Pour the sauce mixture over the vegetable mixture in the skillet; bring to a simmer over medium-high. Add pork and simmer stirring, until thickened, about 1 minute. Serve with rice.