A quick, tangy cucumber and onion salad with a simple vinegar dressing. Thinly sliced cucumbers and red onion tossed with a bright vinaigrette, ready in about 15 minutes.
Thinly slice the cucumbers and red onion. Toss with 1 teaspoon salt and let sit for 10 minutes to draw out excess moisture.
Whisk together the vinegar, water, sugar (or honey), olive oil, and Dijon if using. Add pepper and chopped herbs if desired. Taste and adjust.
Drain or gently squeeze off the liquid from the cucumbers and onion. Toss with the dressing and chill for 10–15 minutes before serving. Adjust seasoning as needed.
Serve chilled or at room temperature. Add optional feta or seeds just before serving to maintain texture.
Notes
Make up to 24 hours ahead; drain excess liquid before serving to prevent watering down other dishes.
Use English or Persian cucumbers for the best texture; remove seeds from large garden cucumbers if they’re watery.
Swap sugar for honey or use rice vinegar for a milder flavor.
For paper-thin slices, use a mandoline and the safety guard.