Easy Onion Relish - cooking recipe

Ingredients

2 lbs large sweet onions, chopped
2 celery ribs, chopped finely
1 medium red bell pepper, chopped
1 -2 tablespoon melted butter
3/4 cup apple cider vinegar
1/4 cup water
2 tablespoons brown sugar (or to taste)
1 teaspoon celery seed
1/4 teaspoon salt (or to taste)

Preparation

Saute onions, celery and red bell pepper in the butter in a Dutch oven for about 15 minutes or until tender (do not brown).
Add in vinegar and remaining ingredients to the mixture; bring to a boil, reduce heat and simmer uncovered for about 20 minutes.
Store in refrigerator for 1 day before using.
Serve chilled or at room temperature.