1 lime, juice only
200g/7oz rhubarb, cut into 2cm/1in pieces
5 drops rhubarb essence (optional)
200g/7oz sweetened condensed milk
75²µ/2½´Ç³ú custard powder
100²µ/3½´Ç³ú plain flour, sifted (plus extra for dusting)
½ tsp almond extract
40²µ/1½´Ç³ú caster sugar
75²µ/2½´Ç³ú caster sugar
2 tsp liquid glucose
1 tsp vanilla extract
75²µ/2½´Ç³ú unsalted butter, softened
300ml/10fl oz double cream
1 medium free-range egg, lightly beaten