This is a refreshing summer dessert our friend Margaret makes each Boxing Day. It is not exactly as Margaret makes it because I made this from memory, it was never written down, but it does taste the same. The first couple of times I made this I used custard powder as I didn't have arrowroot, it worked fine. Make whatever quantity you need and use fresh or frozen berries, it is flexible. The berries look lovely served in martini glasses with bowl on the table for guests to have seconds.