Don't waste precious calories on spreads like mayo or cream cheese when flavorful Onion Tapenade is equally as tasty and much more healthy.
Combine vinegar, sugar, peppercorns, and coriander in a saucepan; bring to a boil, stirring. Reduce heat; simmer 10 minutes. Put onion in a bowl; strain liquid over. Set aside 8 minutes. Drain onions.
Mix onions with remaining ingredients. Serve.
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