Ingredients

2 tablespoons olive oil 

1 large white onion, halved and sliced crosswise (about 3 cups) 

1 1/2 teaspoons coarse salt 

1/3 cup golden raisins 

1/4 cup chopped crystallized ginger 

2 tablespoons champagne vinegar 

Preparation

Heat oil in a medium skillet over medium heat. Add onions and salt and cook, stirring often, until onions are soft and translucent, about 5 minutes. Reduce heat to medium-low and continue to cook until onions are caramelized and evenly brown, about 15 minutes more.

Increase heat to medium-high; add raisins and ginger. Cook, stirring frequently, until raisins have plumped and begin to brown, about 2 minutes.

Add 1/2 cup water and reduce heat to medium. Cook, stirring occasionally, until all the water is evaporated and pan is dry, about 2 minutes. Stir in vinegar and cook until evaporated; keep warm until ready to serve.