Cook egg noodles according to package instructions. If noodles are done before the stir fry, set aside and keep warm.
In a large bowl, combine garlic, 1 tsp cornstarch, and soy sauce. Stir until smooth. Add chicken and stir to coat.
In second bowl, combine broth, wine, and remaining cornstarch.
Heat wok over high heat. When hot, add oil and coat. Add chicken, let cook for 1 minute, to sear, then stir for 1 minute.
Add mushrooms and stir to combine. Stir sauce mix and pour over chicken and mushrooms. Stir fry until chickened is cooked through, 1 -2 minutes.