Once stiff, add sugar 1 tablespoon at a time while the food processor is still whisking away. Whisk until all sugar has been incorporated. Then whisk again on high for 2 mins or so until the mixture is thick and glossy.
Scoop the mixture onto the baking trays to make 12 meringues nest. Flatten them a bit.
Place in the oven for 1 1/4 hour. When done do not open the oven. Just switch it off and leave the meringues to dry for another 2-3 hours. Keep dry in a airtight container.
TO MAKE THE STEWED RHUBARB:
While the meringues are cooking, cut the rhubarb in 3-4 cm chunks [1.2 - 1.6 inch].
400 g rhubarb - pink if possible
Place in a saucepan with the water, sugar, ginger and vanilla.
Cook under medium heat for 10-15 minutes until the rhubarb is stewed. Set aside and leave to cool.
TO ASSEMBLE TOGETHER:
Place some crunched up meringue into 4 individual serving bowls or glasses. Add 2-3 Tbsp of coconut yoghurt in each bowl. Add stewed rhubarb on top, dividing it evenly. Drizzle rhubarb juices on top.