Place Group 1 (see Notes) in saucepan and bring to the boil. Mix Group 2 into a slurry and add to Group 1. Add Group 3 and cook through for a further 2-3 minutes. Cool filling down place in refrigerator until required.
Recipe percentages are on total batter / mix weight (100%). If Fresh Fish (as listed in Group 3) is utilised then this will now become part of Group 1 and boiled also. Do not leave prepared Fish Filling on bench uncovered during the cool down process.