Red Onion Marmalade

4 cups red onion, finely chopped

3 Tbls oil

3 Tbls sugar

2 Tbls red wine vinegar

1/4 cup water

In a large heavy skillet cook onions in oil with salt and pepper to taste over moderate heat, stirring until softened. Add sugar and cook, stirring 1 minute. Add vinegar and simmer, stirring, until almost all liquid is evaporated. Add water and simmer, stirring, until mixture is slightly thickened and onions are very tender, about 10 minutes.