Wash the fillet of beef, dab dry and cut into thin slices. Mix with the Hoi Sin sauce and marinate for approx. 30 minutes. Meanwhile cook the noodles in boiling salted water for 5-6 minutes.
In the meantime, clean and peel the carrots and kohlrabi and cut them into fine strips. Clean the mangetouts. Clean spring onions and cut into fine rolls. Drain the noodles, rinse and drain.
Roast sesame seeds in a hot wok until golden. Take out and put aside. Heat the oil in the wok and fry the marinated pieces of meat briefly on both sides at high heat. Remove and keep warm.
Fry the noodles in the frying fat for approx. 5 minutes while tossing. Add carrots, kohlrabi and sugar snap peas and fry for 2-3 minutes. Add meat again. Season with soy sauce and Sambal Oelek. Cut the chives into fine pieces at an angle, except for a little bit for garnishing.
Sprinkle roast vegetables with sesame, chives and spring onion. Garnish as desired with Asian chives.