The diagram shows the process of making frozen fish pies. In general, the fish pie is made from four main ingredients: peas, fish, potatoes, and sauce, all packed in a microwave-safe container. Both the potatoes and salmon go through several steps before being mixed with the other ingredients, wrapped, frozen, and prepared for storage.
First, fresh potatoes, which can stay fresh for up to a month, are brought to the factory. The potatoes are washed, peeled, and the waste is removed. After that, they are sliced and boiled. Once boiled, they are cooled down and stored for later use.
At the same time, fresh salmon, delivered within 12 hours, is seasoned with lemon juice and salt before being steamed in an oven. After steaming, the skin and bones are removed and discarded. The salmon is then inspected, and once it passes, it is combined with the prepared peas, sauce, and the stored potatoes. The fish pie is then packaged in a microwaveable container, frozen, and ready for storage or delivery.