Pour steaming hot water in a pan or bowl and place another bowl on it. The bowl has to sit tight over the water and not touch it.
Measure the cacao butter in the bowl and let it melt slowly, stirring occasionally.
Add raw cacao powder and grated lemon zest in the melted cacao butter and mix all together.
Pour the melted chocolate in small candy papers.
Drop the arils in the candy papers on top of the chocolate.
Put the chocolate thins in the fridge for about 20 minutes to allow them to set completely.
Tips
If you are new to sugar-free chocolate, I suggest you dip a tsp in the melted chocolate, put a couple of pomegranate aril into it too, and taste. If it feels too tart, add one tsp of maple syrup. I'm pretty sure it doesn't but just in case I'm wrong.