Sweet and Sour Red Onion Relish

2 lbs. red onions, halved and sliced thinly—set aside but have prepared first
1 cup cider vinegar
1 cup dark brown sugar
1 tablespoon yellow mustard seeds
2 tablespoons salt
4 bay leaves

In a medium to large saucepan (at least 2 quarts), place cider vinegar, brown sugar, mustard seed, salt, and bay leaves. Bring to a boil, stirring until sugar melts. Add sliced onions, mixing thoroughly and stirring occasionally. Reduce heat and simmer uncovered 3-4 minutes, until onions turn pink. Allow to cool somewhat before refrigerating. Chill at least two hours before eating. Keeps 1 week.

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