Classic Fish Chowder

Melt butter in a large pot over low heat. Add fatback or bacon, and cook for 3 minutes. Discard pork. Add parsley, bay leaf, potato, and fish fumet. Simmer gently until potato is tender, 6 to 8 minutes.

Add fish, cover, and gently simmer until fish is just cooked through, about 2 minutes. Gently stir in milk and salt, and heat until warmed through, about 30 seconds. Remove from heat. Discard parsley and bay leaf. Serve chowder immediately with freshly ground pepper and chopped parsley on the side.