400-500g/14oz-17oz rhubarb (preferably forced rhubarb), trimmed
250g/9oz plain flour, plus extra for rolling
100驳/3陆辞锄 caster sugar
65驳/2录辞锄 caster sugar, plus extra to taste
1 vanilla pod, split lengthways and seeds scraped out
150g/5陆oz cold butter, cut into cubes
300ml/10fl oz double cream, plus extra to pour
1 medium free-range egg, beaten with 1 tbsp cold water
3 medium free-range eggs
2 medium free-range egg yolks
300ml/10fl oz whole milk