Got it from here: http://www.amazon.co.uk/Things-Marshmallow-Melt-mouth-deliciousness/dp/1910254193
It's basically 2 egg whites worth of marshmallows with 1.5tsp rosewater, 1tsp blue dye and 2tsp pink dye. Pistachio praline in the middle.
You can actually get the base recipe from the look inside. Pages 14 and 18