Balinese Cucumber Salad

Set a dry skillet over medium heat. Add the peanuts and heat until lightly browned, about 2 minutes, shaking the pan occasionally. Transfer to a plate to cool.

Peel and seed the cucumber. Cut the cucumber crosswise into 3-inch sections, then lengthwise into spaghetti-thin strips. Cut the onion into as thin crosswise slices as possible.

Combine the vinegar, sugar, and salt in a serving bowl and whisk until the sugar and salt are dissolved. Taste for seasoning, adding sugar or salt as necessary; the dressing should be both tart and sweet.

Stir in the cucumber and onion. Sprinkle the salad with the peanuts and serve.