In a wok or in a stir-fry pan, heat cooking oil. Saute garlic and ginger until the oil infuses by its aroma and flavor.
Add chicken breast and stir-fry. Season it with a pinch of salt and pepper. Add the seasoning mixture and scallions.
Put the cooked noodles evenly and spread them to avoid sticking. Add mushrooms and stir-fry for 20 minutes in high heat, make sure it is well-coated together, and follow with the sesame oil.
Taste and add salt and pepper if it is necessary. Serve while it's hot and with a dash of sesame seeds.