Lavender syrup has long been made in Provence, France, where fields of fragrant lavender bloom every summer. This homemade version uses freshly harvested culinary lavender blossoms to create a delicate floral syrup that pairs beautifully with coffee, tea, lemonade, sparkling water, cocktails, and desserts. The flavor is subtle and elegant—never overpowering—when steeped for the proper amount of time.

   You can customize this soup any way you like. For example, remove the peas and add celery, or even add only celery instead of peas and corn...