- Wash the cucumbers, quarter them lengthwise, and soak in ice-water for 2 hours.
- Pack onion slices in the bottoms of 5 one-pint jars. Pack the cucumbers lengthwise in the jars. Combine the mustard seed, vinegar, sugar and salt, bring to a boil and boil for 1 minute.
- Fill the jars to overflowing with the boiling-hot syrup and seal.
- Makes 5 pints.
Total time: 2 Hrs