It is a silly idea, because if you are going to use creme fraiche then you might ... A light, sharp curd rather like a very soft and fresh tasting cream cheese. I like this spread on very fresh ...

At Vinnies I will often use creme fraiche or mascarpone as an alternative when creating desserts that would normally call for whipped cream. Heat oven to 180C. Wash the rhubarb, then cut into batons.