Creamy, fluffy and tart; this is the best description for this Tart Rhubarb Dessert Mousse. A deliciously refreshing dessert, that does not take many skills to put together.
Clean the rhubarb and cut it in 1-inch pieces. Transfer them to a saucepan, add the grapefruit juice and cover.
Whip egg white until stiff and do the same with the cream to which you add the vanilla extract.
Cook rhubarb until it boils, then reduce heat to medium low and cook until tender. This is about 3 minutes.Transfer mixture to a blender or bowl, so you can use your immersion mixer. Add sugar, salt and cardamom and blend until smooth
Add egg yolk and return to saucepan. Cook until is starts to thicken after about 3 minutes. Whisk constantly. Allow to cool.
Once the rhubarb mix is cooled, add the egg white and fold egg white into the rhubarb. Then add the whipped cream and fold until combined.