Cucumber & Onion Salad

This is the cucumber salad your grandmother made in a Mason jar and stored in the back of the fridge. Paper-thin slices of cucumber and onion sit overnight in a simple brine of vinegar, water, sugar, and a pinch of salt and pepper, drinking up the sweet-tart liquid until the vegetables turn glassy and tangy.

Paper-thin is the key word. Slice on a mandoline or with a sharp knife, no thicker than ⅛ inch. Thicker slices stay raw-tasting in the brine no matter how long they soak. Thin ones turn slightly translucent and pickle through to the center within a few hours.

The overnight rest is non-negotiable, sorry, is essential. The brine needs time to soften the onion bite, mellow the cucumber’s grassy edge, and balance the sweet-sour flavor. Stir or flip the jar a few times so the slices on top get their turn in the liquid.

This is a classic Midwestern picnic and potluck side, the cool, crunchy counterpoint to fried chicken, brats, or barbecue. It also keeps for up to a week in the fridge, getting better and more pickle-like with each day.

Kitchen Tips

• Use English or Persian cucumbers if possible. They have thinner skins and fewer seeds, which means less bitter water leaching into the brine.
• Sweet onions like Vidalia or Walla Walla mellow faster than yellow onions. If only yellow is on hand, soak the slices in cold water for 10 minutes before adding to cut the harshness.
• Use white or apple cider vinegar. Both work; cider gives a fruitier finish, white vinegar a sharper one.
• For a crisper result, salt the cucumber slices for 15 minutes and drain off excess water before adding to the brine.

Variations

• Add 1 thinly sliced bell pepper or a handful of cherry tomatoes for color and crunch.
• Stir 1 tablespoon of fresh chopped dill into the brine for a deli-counter twist.
• For a creamy version, drain off most of the brine after the overnight rest and toss with ½ cup of sour cream before serving.