Whisk egg yolk ad sugar till thickened.
Heat up the milk and cream, don't boil. Then add in chopped lemon grass in.
Strain the mix with a fine strainer and leave it till lukewarm. Mix in the mix into the whisked yolk and sugar. Stir well. Pour into a nice shallow bowl. Place onto a baking tray and bake with water bath at 150deg c to 160deg c for half an hour to one hour. Place it into the chiller till the mix is stable. Finally garnish with caramelized sugar and all kind of berries.