In a cocktail shaker, muddle blackberries and thyme with a wooden spoon. Add orange juice, lemon juice, honey, and cinnamon and shake well. Pour a glass, and top with soda. Garnish with blackberry in thyme sprig. Serve chilled.
I love this dessert, the meringue can be made the day before, the fruit and syrup can be done the day before or earlier in the day and all you need to do is whip the cream and put it all together.