Cook rice noodles according to instruction on the package.
Fry chicken, when lightly golden remove from wok. Clean the wok, heat 1 soon of oil, add garlic and onion. When onion change colour, add string bean, fry about 7 min.
Add chicken and tomatos, mix well.
Mix sauce ingredients.
Add sauce to the wok, mix well, continue frying for 3 min.