Stir-Fried Sweet and Sour Pork Recipe

For the Pork: In a small bowl, stir together egg white, cornstarch, rice wine, and salt until thoroughly mixed. Place sliced pork in a bowl pour cornstarch mixture on top, tossing to coat thoroughly. Refrigerate for 30 minutes. Fill the wok with water and bring to a boil over high heat, then add oil. Add pork, stirring with chopsticks or a strainer to separate the pieces, and cook until pork is opaque and nearly cooked through, about 40 seconds. Drain work into a colander and shake well to remove excess water. Wipe wok clean and dry thoroughly. For the Stir-Fry: In a small bowl, stir together pineapple juice, tomato paste, rice vinegar, soy sauce, sesame oil, and cornstarch. Heat vegetable oil in wok over high heat until smoking. Add bell peppers and onions and stir-fry for 30 seconds. Add pork and continue to stir-fry until browned in spots, about 2 minutes. Using a spatula, push pork and vegetables up side of wok, then add sauce so that it pools in center. Bring sauce to a boil, stirring, then toss with pork and vegetables until sauce thickens and coats them well. Turn off heat and toss in pineapple chunks. Transfer to a platter immediately and serve with rice.