Cut the bread into small pieces. Cover it with milk and leave it in the refrigerator to soften and absorb the milk. Squash the bread with a fork when it is very soft.
Put the bread in the blender bowl.
Blend the bowl content.
Add the egg in the blender bowl.
Blend once more the bowl content.
Wash the raspberries and blackberries carefully and cut them in half.
Put the blackberries in the blender bowl.
Put the raspberries in the blender bowl.
Place the preparation is a small ramekin and put it in the steamer basket.