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- 1 tablespoon olive oil
- 2 onions, peeled and sliced
- 1 head of
- Heat the oil in a large pan and add the onions, fennel and celery. Cook over a low heat until the vegetables have softened, about 10 minutes.
- Rinse the fish bones in several changes of water to remove any blood traces, then add them to the pan. Cover and steam for 10 minutes.
- Add the wine and simmer, uncovered, for 10 minutes.
- Add the herbs