Cut the mushrooms into thin slices.
Cut the cherry tomatoes in half.
Grate the cheese on a fine grater.
Make the sauce: mix mayonnaise and grainy mustard.
Heat a frying pan and fry the mushrooms in vegetable oil for 5 minutes until done. Add salt and pepper.
Cut the chicken fillet into small pieces and fry in vegetable oil for 8-10 minutes. Fry over medium heat so that the chicken is fried inside and does not burn on the outside. Salt and pepper.
Tear the iceberg lettuce with your hands and place in a deep bowl. Add the chicken, mushrooms and cherry tomatoes.
Season the salad with mayonnaise-mustard sauce and mix.
Place the salad on a plate and sprinkle with grated cheese.