Caramelized Onion And Balsamic Relish - cooking recipe

Ingredients

1/3 cup olive oil
2 1/2 lbs large red onions, thinly sliced
2 cloves garlic, crushed
2 tsp yellow mustard seeds
1/3 cup firmly packed brown sugar
2/3 cup balsamic vinegar
1/2 tsp salt

Preparation

Heat oil in a large deep skillet on low heat. Add the onions and garlic and cook, covered, for about 30 mins until softened. Stir occasionally.
Stir in the mustard seeds and cook 1 min or until fragrant. Add the sugar, vinegar and salt. Bring to a boil. Reduce the heat to low. Simmer, uncovered, stirring occasionally for about 5 mins, or until most of the liquid has evaporated and the onions are caramelized.