- Juice of 5 Seville (sour) oranges (about 1 cup)
- 1 red onion, cut into 1/4-inch dice
- 1/2 cup chopped flat-leaf parsley
- 1/2 cup olive oil
- 1 teaspoon salt
- Place the orange juice, onion, parsley, olive oil, and salt in a mixing bowl and blend well using a wire whisk. Keep refrigerated for up to 2 days.