In large saucepan, bring 5 cups (1.25 L) water to boil; add tea bags. Steep for 3 to 5 minutes; reserve 1/2 cup (125 mL) tea. Add glass noodles to saucepan. Let stand for 10 minutes or until tender; drain well and divide among 4 bowls.
Whisk together soy sauce and cornstarch until smooth; stir in 1/2 cup (125 mL) reserved tea, lemon juice, ginger, honey and sesame oil. Set aside.
Heat half of the canola oil in wok or large saucepan set over high heat; cook chicken, five-spice powder, salt and pepper, stirring, for about 2 minutes or until chicken starts to brown. Transfer to plate.
Heat remaining canola oil in same saucepan; cook onion, pepper, celery, carrot, garlic and water chestnuts, stirring, for about 2 minutes or until tender-crisp. Stir in soy sauce mixture; bring to boil. Return chicken to pan; cook, stirring, for about 1 minute or until chicken is cooked and sauce has thickened slightly.
Serve stir-fry over noodles. Sprinkle with green onions and sesame seeds. Serve with lemon wedges.