Sweet Onion Relish I

2 to 3 teaspoons vegetable oil
4 3/4 cups chopped Vidalia or other sweet onion
1 1/2 cups thinly sliced Vidalia or other sweet onion
1/3 cup chopped celery
1/2 cup sugar
1/4 teaspoon salt
1/2 teaspoon celery seeds
1/8 teaspoon pepper
1/2 cup cider vinegar
1/4 cup water
2 ounces diced pimiento (1 jar), drained

Heat oil in a large skillet over medium. Add onions and celery; sauté for 10 minutes, or until tender. Stir in sugar and remaining ingredients; heat to boiling. Reduce heat and simmer, uncovered, for 25 minutes, stirring often.

Let cool. Spoon into a bowl; cover and chill for 8 hours.
Serves 4 to 6.