Instructions: Put the onions in a pan with the wine vinegar, olive oil, sugar, tomato puree, herbs, raisins, salt and pepper and 1 1/4 cups water. Bring to a boil and simmer gently, uncovered, for 45 minutes or until the onions are tender and most of the liquid has evaporated. Remove the bay leaf and parsley, check the seasonings, and transfer to a serving dish. Serve at room temperature.

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