Wash the cod, skin it, and cut it into small pieces diliscarlo rettangolari.Prepare the batter with water, mineral water, white wine, a few drops of balsamic vinegar, yeast, salt, oil, flour. Let rise for 12 hours. Take the cod fillets and dip in batter and fry them already risen in a pan with plenty of peanut oil. Before serving it with a dry cloth and serve hot.