Preparation
Bring a large saucepan of water to a boil. Add noodles and cook according to package directions. Drain, rinse with cold water and set aside.
Meanwhile, slice chicken into thin slices, lengthwise; cut each slice into matchsticks. Whisk water, rice wine (or sherry), soy sauce and cornstarch in a small bowl.
Heat oil in a large skillet over medium heat. Add onion and cook, stirring occasionally, until beginning to soften, 2 to 3 minutes. Add bok choy and cook, stirring occasionally, until beginning to soften, about 5 minutes. Add the chicken, garlic and chile-garlic sauce; cook, stirring, until the chicken is cooked through, 2 to 3 minutes.
Whisk the cornstarch mixture again, add it to the pan and bring to a boil. Cook, stirring, until the sauce has thickened, 2 to 4 minutes. Serve the chickenand vegetables over the noodles.