Again, it's very easy and it takes minutes.
To make about 6/7 congolais, you need 2 egg whites, probably 20g sugar (you can add powdered milk or condensed milk), and some dry gratted coconut (to wanted consistency). beat the whites, incorporate the sugar and the coconut until the mix is on the verge to not be foamy anymore. shape them as little rocks and press them when doing so:
Place them in the oven at 200 degrees for about 10 minutes, until they start to be golden on the outside.
These are great out of the oven or cold, and you can keep them in a biscuit tin for a fey days!
Source: my own meanderings