Boil rockfish in 1 pint of water with 1/4 teaspoon salt until it will flake. Pour off broth and save 1/2 cup. Cook onion in butter until tender, and blend in flour. Add 1/2 cup milk and 1/2 cup rockfish broth and cook until thick, stirring constantly. Flake the cooked rockfish fillet, and remove any shell from crab meat. Carefully tumble them together with 1/2 cup bread crumbs. Add seasonings, fish flakes and crab meat to sauce and carefully mix. Place in about 12 greased crab shells, artificial shells or custard cups. Bake at about 350 degrees for 20 to 25 minutes or until slightly brown. Yields 12 servings.
» The next time you entertain extra-special guests, dazzle them by serving rockfish and crab meat. Very few entrees match its elegance and eye appeal.