Cook the pasta in boiling salted water for about 5 minutes. Then drain, quench and allow to drain. In the sizzling time cut the peppers in half, clean, wash and cut into strips.
Clean, wash and cut the leek into strips about 1/2 cm wide and about 3 cm long. Drain the bamboo and cut into thin slices. Wash chicken fillets, dab dry and season with salt and pepper.
Heat 1 tablespoon of oil in a frying pan and fry the chicken fillets in it for about 8 minutes, turning several times. In the meantime, cut the chili into thin slices. Heat the remaining oil in a second pan and fry the vegetables in it for about 1 minute.
Add the noodles and fry over medium heat for about 6 minutes. Season with salt and pepper. In the meantime chop the peanuts roughly. Remove chicken fillets from the pan and keep warm. Add stock and soy sauce.
Bring to the boil. Stir starch with 1 tablespoon of water until smooth and thicken the sauce. Stir in chilli. Cut chicken fillets open, arrange on a plate with fried noodles and sauce. Sprinkle with the peanuts.