Wash the potatoes, cook for 20 minutes, drain, rinse, peel and finely mash. Add cheese, semolina, flour, egg yolk, salt, pepper and nutmeg to the potato mixture with the whisk of the hand mixer.
Bring salted water to the boil. Form the dough into potato noodles with floured hands. Cook in boiling water at low heat until the noodles float on the surface. Drain on kitchen paper.
Drain the chanterelles on a sieve. Wash the meat, dab dry and cut into small pieces. Clean the mushrooms, rub with kitchen paper, cut in half. Clean, wash and cut spring onions into rings.
Peel and finely chop the onion. Wash, quarter, seed and chop the tomato. Fry meat in hot oil while turning for about 6 minutes. Add prepared vegetables and fry for another 5 minutes. Season vigorously.
Deglaze with stock and cream and simmer for 5 minutes. Thicken with sauce thickener and keep warm for a short time. Fry the potato noodles in hot fat in a large frying pan, turning them golden brown. Serve in portions garnished with tomato cubes and parsley.