Wash and clean the mushrooms and cut them into thin slices, sprinkle with lemon juice. Clean, wash and drain the salad well. Arrange the salad leaves on plates and arrange the mushrooms on top. Wash and clean spring onions and cut into fine rings.
Peel garlic and chop finely. Heat oil in a pan and fry spring onions and garlic. Add vinegar and season to taste with sherry, salt, pepper and sugar. Pour the sauce warm over the mushrooms