Key Ingredients for Cucumber Salad Cucumbers. Thin-skinned English cucumbers don't need peeling or seeding. Onion. Red onion adds color and lots of flavor. Vinegar. Marinate the cucumbers in apple ...

along with the cucumber and red onion. Scatter over the finely chopped garlic and add a pinch of salt. Mix until well combined. Pour in the remaining red wine vinegar, plus more to taste ...