Finely chop the mushrooms and put them to fry together with the onion, also finely chopped, lightly add salt
Put the mushrooms in a salad bowl, add to them finely chopped boiled breast, nuts. If you want to add salt, add pepper, oil and lemon juice, mix gently
Slice the lettuce. Put the salad in portions, and grate the parmesan on a fine grater on top. Serve the salad warm.