Ingredients
- 1 cup apple cider vinegar
- 1 tablespoon olive oil
- ½ cup granulated sugar
- ½ cup cool water
- ½ teaspoon salt
- ½ teaspoon fresh ground black pepper
- ½ teaspoon celery seed (optional)
- 2 English cucumbers thinly sliced (see notes)
- ½ red onion thinly sliced
