|3 tsp||vanilla sugar|
|butter for greasing|
|whipped cream to serve|
Preheat oven to 200°C/400°F. Cut brioche and rhubarb into bite-sized pieces.
Mix brioche and rhubarb with sugar, vanilla sugar, and a pinch of salt.
Grease ovenproof dish with some butter and add brioche and rhubarb mixture.
For the custard, whisk together egg whites, egg yolks, and milk. Pour the custard over the rhubarb mixture.