150g caster sugar
Zest of ½ lemon
½ vanilla pod, split lengthways
500ml double cream
(sh) For the rhubarb compote
Juice of 2 oranges
2 tbsp caster sugar
1 vanilla pod, split lengthways
1kg forced rhubarb, trimmed, washed and cut into 2cm chunks
1. Make the compote. Put the orange juice, sugar and vanilla in a pan over a low heat and stir until the sugar dissolves. Add the rhubarb and bring to a simmer, then remove from the heat. Cover and set aside for 10 minutes. The rhubarb pieces should break down into a compote in that time. If not, cover for another 5 minutes, then remove the vanilla pod. Chill for up to 3-4 days.
2. Make the ice cream. Put the sugar, lemon zest and vanilla together in a pan. Add the cream and bring to a very gentle simmer on the hob, stirring, until the sugar dissolves. Cool completely, strain into a bowl and stir in the buttermilk.
3. Churn the mixture in an ice cream maker for 15-20 minutes or, if you’re not using one, allow to freeze for 2 hours before whisking the edges into the middle. Repeat 1 hour later, and 30 minutes after that, before allowing the ice cream to set in the freezer. Serve scoops of ice cream with the compote.