The easiest way I can explain this recipe is to give you the recipe that is directly from Purity, the makers of the bread. This is a very common dish in Newfoundland
To prepare the Brewis
Split the cakes of the Hard Bread, allowing one cake per person. In a large Saucepan place the Hard Bread, well covered with water. Soak overnight. The next day using the same water, salt to taste and bring Bread to a near boil. DO NOT BOIL, DRAIN IMMEDIATELY. Keep Hot.
To Prepare Salt Fish
Use Skin dried salt fish. Cut the fish into serving pieces, cover with cold water and soak overnight. The next day change the water and bring to boil for 20 mins or until the fish flakes with a fork. To add scrunchions , find diced salt pork and fry until golden brown. Add the fat from the pork and the bits of cooked pork to the dish.
Combine the cooked fish with the prepared brewis and pork fat and pork to serving bowl and serve.