Thinly slice the cucumbers into 1/8-inch rounds and arrange them on paper towels. Sprinkle with salt and let sit for 20 minutes—this draws out excess moisture so the salad won't become watery and diluted. While the cucumbers release their liquid, you can prepare the other components. After 20 minutes, gently pat the cucumbers dry with fresh paper towels to remove as much moisture as possible.

In a medium bowl, combine the white vinegar, sugar, water, vegetable oil, celery seed, and black pepper. Stir until the sugar completely dissolves—this typically takes 1-2 minutes of stirring. The balance of sweet and tangy flavors is what makes this salad special, so ensure the sugar is fully incorporated before proceeding. I like to taste a tiny spoonful at this stage to confirm the flavor is balanced to your preference.

Add the thinly sliced onion half-moons to the pickling liquid from Step 2 and let them sit for 5 minutes. This brief soak softens the raw bite of the onion and allows it to absorb some of the tangy flavor, making it much more pleasant to eat. The onions will also release their juices slightly into the dressing.

Add the patted-dry cucumbers from Step 1 and the fresh chopped dill to the bowl with the onions and pickling liquid from Step 3. Gently toss everything together until well coated. Transfer the salad to a serving dish or storage container and refrigerate for at least 2 hours before serving—this allows all the flavors to meld together beautifully. I find that this salad actually tastes even better the next day as the cucumbers continue to absorb the dressing and the flavors deepen.