How to Make It
Bring a large saucepan of salted water to a boil. Add the potatoes and cook over high heat until tender, about 9 minutes. Drain, gently shaking out the excess water. Spread the potatoes on a baking sheet in a single layer and freeze for about 10 minutes, just until no longer warm.
Meanwhile, in a large bowl, whisk the yogurt with the mayonnaise until smooth. Add the cucumbers, chile, mint and dill. Fold in the potatoes, season with salt and pepper and serve.