1. Peel onion and slice very thinly. simmer in salted water till tender.

2. Put well - cleaned and gutted fish into a casserole.Pour onion with liquid over.

3. Cook in a hot oven for 20 minuties.4. crumble ginger bread into vinegar and syrup.

5. Take out fish. remove backbones. 6. pour gingerbread mixture into a large dish.

6. Arrange mackerels over mixture. Decorate with thin slices of lemon and chopped parsley.

8. serve hot.