Lime posset is wonderful, too , made exactly the same way. The posset will keep overnight in the refrigerator. Let it sit for a while at room temperature before serving so that it's not too cold. Raspberries, both golden and red are just one of the fruits you can use to top the dessert. Diced mango is another option. You an also use blackberries, heated gently in a pan just to the point they give up their juice. Add a little sugar and pour cooled berries over posset, then garnish with a sprig of mint, preferably variegated.