Canning method
Wash and chop the vegetables. Combine them with 1/2 cup canning or pickling salt, cover with hot water, and let stand for 12 hours. Drain, then press the vegetables in a clean white cloth to remove as much liquid as possible.
Tie the mixed pickling spice loosely in a spice bag. Combine the spice bag, vinegar, and brown sugar in a saucepan and bring to a boil. Add the drained vegetables and boil gently for 30 minutes, or until the mixture is reduced by one-half. Remove the spice bag.
Fill hot, sterile half-pint or pint canning jars with the hot mixture, leaving 1/2-inch headspace. Remove air bubbles, adjust the headspace if needed, wipe the jar rims, and apply the lids.
Process hot-packed half-pint or pint jars in a boiling-water canner for 5 minutes at 0–1,000 feet, 10 minutes at 1,001–6,000 feet, or 15 minutes above 6,000 feet.