1 lemon, juice only
2 lemongrass stalks very finely chopped to almost a powder
700²µ/1Β½±τ²ϊ rhubarb
110g/4oz icing sugar
140g/5oz unrefined organic sugar
4 tbsp white chocolate, grated or peeled into shavings
150ml/¼ pint crème fraîche (preferably organic) or 1 small carton
150ml/ΒΌ pint mascarpone cream
1 small glass sweet wine, optional