Instructions:
Cut the boiled potatoes into small pieces, add all the ingredients and let them marinate in the fridge for 4 hours. Remove the bones and scales from the sardines; place them in the salt for 10 minutes and in the vinegar for a further 10. Stir the rest of the ingredients into the olive oil. Rinse the sardines, pat them dry and place them with the olive oil in a jar. Leave them for at least 10-12 days. Prepare the mayonnaise in the usual way; note only that the oil you should use has to have been cooked with the shrimp shells at 60 °C for 4 hours.
Recipe by Kardamo , Messinian Gastronomy Festival 2019