Combine all ingredients and simmer gently, for 11/2 hours strain and retain stock for fish soup.
Pick out vany meat of the fish which remains in solid pieces to use as fish balls
Peel kohlrabi and cut into slices or cubes.
Coverwith water and add 1 tbsp. vinegar for every pound of kohlrabi let stand 1 hr.
Rinse, cover again with water to which 1/4 tsp salt has been added for...