Start by washing the English cucumbers thoroughly. Cut them in half lengthwise and then slice them into thin half-moons. You can choose to peel them if you prefer, but the skin adds a lovely crunch and color.
Next, peel the red onion and slice it thinly. The onion adds a vibrant color and a sweet flavor to the salad, balancing the dish beautifully.
In a mixing bowl, combine the sour cream, minced dill, minced parsley, distilled white vinegar, granulated sugar, salt, and ground black pepper. Whisk everything together until smooth and creamy.
In a large bowl, combine the sliced cucumbers and red onion. Pour the dressing over the vegetables and toss gently to coat everything evenly.
Cover the bowl with plastic wrap and let the salad chill in the refrigerator for at least 30 minutes. Serve chilled as a delightful side dish or a light lunch.