Disclaimer: the equipment list above includes affiliate links to products I use and like.
Ingredients
400gchickpea can - best if the can does not contain salt
1/2tspcream of tartar
200gdark chocolate
1Tbspsugar
Instructions
Drain the chickpea and transfer the brine to the bowl of a food mixer. (you can use the chickpeas to make hummus later)
400 g chickpea can - best if the can does not contain salt
Break the chocolate and place it into a heatproof bowl. Sit the bowl in a pan over simmering water so that the chocolate melts. Stir often.
200 g dark chocolate
With your food mixer on high speed, whisk the chickpea brine to stiff peaks (as you would do with egg whites). It should take 5-10 mins depending on your food mixer or whisk. Add the cream of tartar and sugar. Whisk for another 10 seconds.
1/2 tsp cream of tartar, 1 Tbsp sugar
Once the chocolate is melted, cool it down so you can touch it. You want the chocolate to have cooled down but still, be liquid. If it is too hard it will not mix well for the next step.
With a spatula, carefully fold half of the chocolate in the whisked chickpea brine. Once it is well mixed, carefully fold the second half. Transfer mousse to a serving bowl or serving dishes. Leave to set in the fridge from 4 hours to overnight.