This luxuriously creamy pouring vanilla sauce, which I cannot resist, is the perfect match for the Spiced Poached Pears (p.218). I guess you could just call it custard, but I think the French name sounds a bit more exotic!
Add the milk, sugar, vanilla extract and turmeric to a large saucepan and slowly heat.
Once hot pour in the cornflour mixture and stir continuously until thickened and the custard coats the back of the wooden spoon.. about 6 minutes.