Rhubarb Vanilla Flan

Name: Rhubarb Vanilla Flan
Prep time: 5 min
Cook time: 50 min
Total time: 50 min
Yield: 8 portion
Ingredients: butter, unsalted (from cows' milk); 3 egg, European medium (53-63 g) (from chicken); 60 gram wheat flour; 200 gram cow milk; 200 gram double cream (around 48 % fat); 150 gram caster sugar; 1 teaspoon vanilla extract, natural; 200 - 250 gram rhubarb