Gradually melt 100 g of sugar in a saucepan until you get a light caramel. Deglaze with 100 ml water and simmer for about 5 minutes. Divide the caramel into 4 oval timbal moulds (approx. 100 ml content).
Chill for about 20 minutes until the caramel has set. Warm the egg, egg yolk and 50 g sugar slightly until the sugar has dissolved. Stir smooth with the milk and pour through a sieve. Carefully pour the egg-milk onto the caramel and cook in a water bath in a preheated oven (electric cooker: 150 °C/ gas: level 1) for approx. 40 minutes.
Then put in a cool place for 1 day. Clean, wash and cut the rhubarb into pieces of about 2 cm. Boil 200 ml water with remaining sugar, vanillin sugar and orange peel. Add the rhubarb and let it stand for about 5 minutes.
Remove, put aside and bring the stock to the boil. Stir the pudding powder with 2 tablespoons of water until smooth and thicken the stock. Pour through a sieve, allow to cool and add the rhubarb again.
Using a knife, remove the creams from the edge of the mould and turn them over onto plates. Spread rhubarb compote on top and decorate with mint.