Fiesta Onions - cooking recipe

Ingredients

Marinade:
1/2 cup white vinegar
1/2 cup water
3/4 cup white sugar
6 Spanish onions, thinly sliced
Dressing:
3/4 cup mayonnaise
1 tablespoon celery seed
salt and ground black pepper to taste

Preparation

Combine vinegar and water in a large bowl. Whisk sugar into the vinegar mixture until dissolved. Add onion slices and marinate at least 3 hours; drain.
Whisk mayonnaise, celery seed, salt, and pepper together in a separate bowl; add to drained onion slices and fold to coat. Marinate at least 2 hours before serving.