Wash the chicken filet, dab dry and cut into strips. Cook the noodles in plenty of boiling salted water for about 15 minutes. In the meantime clean the mushrooms. Cut larger mushrooms in half. Clean and wash spring onions and cut them diagonally into rings.
Wash the tomatoes, dab dry and cut in half. Wash the rocket and spin dry. Fry chicken fillet in 1 tablespoon of oil until golden brown. Remove and keep warm. Add 1 tablespoon of oil to the frying fat and fry the mushrooms until golden brown.
Deglaze with vinegar and season with salt and pepper. Mix chicken fillet, noodles, mushrooms, tomatoes, spring onions and rocket in a bowl and sprinkle with coarsely ground pepper.