Lemon and Rosemary Posset

My other name for this is the Easiest Pudding You Can Wish For. Serve this on its own or with cookies or shortbread. It’s also nice with a mixed berry salad: chopped strawberries, blueberries, raspberries and blackberries tossed in a little confectioners’ sugar. If you prefer, you can simply leave out the rosemary, or, for a bit of variety, use half lemon and half lime juice. A finely chopped piece of preserved ginger and 2 tablespoons ginger syrup from the jar spic