400²µ/14¼´Ç³ú rhubarb, cut into 5cm/2in pieces
75²µ/2½´Ç³ú plain flour
120²µ/4¼´Ç³ú caster sugar
icing sugar, to taste
2 tbsp granulated sugar
1 vanilla pod
20²µ/¾´Ç³ú butter, plus extra to grease the dish
crème fraîche, to taste
150ml/5¾fl oz double cream
5 free-range whole eggs
150ml/5¾fl oz full-fat milk