Just made these the other day.
Wash cucmbers and cut of ends ends. Do not peel.
9 cups thin sliced(like paper) unpeeled cucumbers (mandalin is used)
1 cup sliced onion (using the mandalin, too)
2 cups white sugar
1 cup apple cider vinegar
1 Tablespoon celery seed
1-2 Tablespoons regular salt
Place in Large stew pan or large bowl. Place items in order as noted. Let set -- liquid will appear and stir every once in a while. When enough liquid, place cuckes than liquid to cover, and keep refrigerated. Let set for day or two. Use as salad, or on hamburgers. Delicious. We really love these. Delicious