In a small bowl combine dried mushrooms and 1 cup warm water; let stand for 15 minutes.
Drain mushrooms, squeezing out excess liquid; reserve liquid. Slice mushroom caps; discard stems. Stir cornstarch into reserved mushroom liquid.
Cook pasta according to package directions. Drain and keep warm.
In a bowl stir together the chicken, sherry, soy sauce, ginger, and garlic; set aside.
Lightly coat a wok or large skillet with nonstick cooking spray. Heat over medium-high heat. Stir-fry sugar snap peas and carrots for 3 to 4 minutes or until crisp-tender. Add green onions and stir-fry for 1 minute more. Remove vegetables from wok and set aside.
Add chicken mixture to wok. Stir-fry for 2 to 4 minutes or until chicken is no longer pink.
Push chicken from center of wok. Stir cornstarch mixture; add to center of wok. Cook and stir until thickened and bubbly.
Return vegetables to wok. Add mushrooms and pasta. Stir to coat with sauce.