Cook the pasta in boiling salted water for about 8 minutes until al dente. Clean the mushrooms, rub carefully with kitchen paper and chop if necessary. Remove the crusts from bread and chop very finely. Whisk egg with salt and pepper. Turn the mushrooms first in the egg, then in the breadcrumbs. Fry in hot fat until golden brown. Clean and wash the salad and pluck into bite-sized pieces.
Coarsely chop the nuts. Mix oil and vinegar. Season with salt and pepper. Add nuts. Drain noodles, rinse with cold water and drain well. Mix pasta, salad and walnut vinaigrette. Arrange on plates with the mushrooms