Fish bones and heads, washed
1 potato, peeled and sliced (optional)
2 onions, sliced
1-3 teaspoons salt
3 carrots, whole or sliced
1-3 teaspoons sugar (optional)
Place all ingredients in a large pot and fill one- third to one-half full of water. There should be enough water to cover the fish to be added later. Bring to a boil.