Jellied Mushrooms with Mayo

Description
In Romanian: Ciuperci cu gelatina si maioneza

Ingredients

 * 2 lbs/1 kg mushrooms,
 * 1 onion,
 * 1 teaspoon butter,
 * gelatine,
 * salt,
 * mayo

Directions

 * 1) Wash and julienne the mushrooms. Place in a pot with a whole onion, one teaspoon of butter and salt. Cover with water and let boil until the mushrooms are soft.
 * 2) Remove the onion and strain. Leave the mushrooms aside and strain again through cheesecloth. Add gelatine to this liquid (one tablespoon of gelatine for each cup).
 * 3) Heat until the gelatine is melted. Place the mushrooms on the bottom of a deep plate (or several smaller molds).
 * 4) Pour the gelatine liquid on top. Strain when pouring. Regrigerate so that it gels. Serve with mayo.