In a large salad bowl, combine the sliced cucumber, radishes, chopped dill, and spring onions (if using).
Sprinkle the salad with salt to taste. You can start with a pinch and adjust according to your preference. Pour the sour cream over the vegetables.
Gently toss the salad to evenly coat the vegetables with sour cream and distribute the flavours.
For an extra refreshing touch, you can chill the salad in the refrigerator for a short time before serving. Serve the Ukrainian Salad as a side dish or a light and refreshing snack.