Orange, Seville or Bitter

The flesh of the Seville orange is too bitter to eat, but its juice is much used in Iranian cookery, and some recipes call for the intensity of Seville orange paste, made from the juice. Lacking Seville orange juice, you may substitute ¼ cup fresh sweet orange juice plus 2 tablespoons fresh lime juice for every ½ cup of the Seville juice called for in a recipe. For treatments of orange peel and paste.