Blueberry Mousse from the art of cooking

ingredients:
100g blueberries
50g sugar
1 g of agar
125 g of natural yoghurt
1 egg white
method:

1. Mix blueberries with sugar and 30 g of agar.
2. Mount this mixture to a boil and gradually stir in the yogurt. Put out the fire.
3. Mount the white snow and do meringuer with 20 g of sugar remaining.
4. Mix together the two preparations by gently lifting the egg white so as not to crush.
5. Allow 2 hours to cool in glasses.
Note: It may happen that the foam make a little juice in the bottom of glasses. It does not matter, the juice has a good taste of blueberries
http://www.odelices.com/recette/mousse-aux-myrtilles-r3115/