Soak the chickpeas in plenty of water from the previous evening.
Strain them and put them in the blender with the onions, the tomatoes (which you have already peeled), the spearmint, the salt and pepper
And blend well.
If the mixture is thick and does not blend well, add a small tomato or a bit of water.
Empty the mixture into a bowl and add the flour and the baking powder (put as much flour as needed in order to get a mixture that is neither too thick nor too runny) and stir.
Let it sit for about an hour
Then fry them. Using a teaspoon, take spoonfuls of the batter and drop into plenty of hot olive oil (in a pot or a fryer) so that they are covered in it, till they are golden.
