Chilled Tomato, Watermelon, and Basil Soup

How to Make Orange Zest:

• Using a grater or microplane, shave off the peel of an orange to make ¹⁄₂ teaspoon of shavings.
• The shavings are your zest, which add strong, wonderfully citrus flavor to foods.
• Use only the colored part of the peel, not the bitter white pith beneath.