Step 1: Cut the beef-heart into sliced pieces removing all tendons, fat and gristle from the heart. It is important to remove the fat and gristle as it can be detrimental to your fish.
Step 5: Once everything has been thoroughly mixed together, place the mixture into freezer bags. When filling the bags, we attempt to have the beef heart mixture thinly spread throughout the bag. This enables us to easily break the mixture into pieces once frozen.