This refreshing cucumber soup is the perfect starter for a summer meal. With just a handful of simple ingredients, it comes together in under an hour and is a great way to showcase the crisp, cool flavor of cucumbers. The addition of tarragon and vinegar gives it a bright, tangy twist, while sour cream adds a touch of richness. This soup is not only delicious but also nutritious, offering a good source of vitamin K, vitamin C, and manganese. It's also gluten-free, making it an inclusive dish for guests with dietary restrictions. The preparation is straightforward: cook the scallions, add cucumbers and other ingredients, blend, and serve. Garnish with cucumber slices and parsley for a beautiful presentation. This soup is a wonderful way to begin a meal, and it's sure to impress your guests with its unique flavor and health benefits.