We salt the snails one hour before cooking them. We rinse them well three times, drain them, and separate the live ones. We place them in a basin, add a handful of fine salt, and stir every 5 minutes for half an hour to help them release their mucus. Then, we rinse them well with water and boil them for half an hour. We discard the water, rinse them again, and boil them for another 1.5 hours in a large pot. Finally, we add the remaining ingredients and let them boil with the snails for 10 minutes.