A classic condiment popular in Atlantic Canada, mustard pickles are sweet, tangy, and the perfect condiment to serve with roasted meats, and poultry. Mustard pickles can even be used as a relish on burgers and sandwiches!
Begin by washing the cucumbers, cauliflower and the red bell pepper. Once washed, pat the vegetables dry, and proceed with peeling and cutting.
The cucumbers should be peeled, core removed, and cut into a medium dice. Once the cucumbers are cut, sprinkle the coarse salt over the cucumbers and mix well. Set aside to let the salt draw some of the water out of the cucumbers.
Cut the cauliflower into small bite sized florets, and the bell pepper into a small dice. Peel the onion and cut it into a small dice as well. Set all the vegetables aside to prepare the pickling sauce.
Measure out the sugar, vinegar, spices and flour. Mix all of them together in a large pot, and stir until a smooth 'sauce' is formed. There should be no lumps of flour. Heat the sauce over medium low heat, stirring often, until it thickens and coats the back of a spoon.
Drain any liquid that has been drawn from the cucumbers, and add all the cut vegetables to the thickened 'sauce'. Stir well to coat all the vegetables. Bring the pot back to a simmer, and cook the vegetables over medium low heat for 20-25 minutes. Stir often to prevent scorching.
Preparing your canning equipment
While the mustard pickles are simmering on the stove, assemble, wash, and prepare all your canning equipment. This includes: washing all equipment, pots, and jars/lids in hot soapy water, heating the washed snap lids and rings for at least 10 minutes to sterilize them, boiling the washed glass jars for 10 minutes prior to filling in a large canning pot (keep jars and lids in hot water until ready to fill), setting out a dishcloth and rack on which the processed jars can cool, ensuring you have all tongs, ladles, stir spoons, and funnels you plan on using properly washed and dried.
Processing the mustard pickles
Use your canning tongs to carefully remove a glass jar from the hot water (one at a time). Gently pour the water back into the pot, then fill the hot glass jar with the hot mustard pickles using your ladle and funnel. Repeat this process until all glass jars are filled, leaving ½ inch of headspace at the top. Work carefully to prevent spilling, yet quickly to prevent the mustard pickles and jars from cooling too much.
Once all the jars are filled, use a clean dampened cloth to wipe all the jar rims, removing any spilled pickle residue, and leaving a clean surface for the flat lids to seal to. Place a snap lid on each filled jar, followed by the metal ring, making sure not to twist the ring on too tightly. Fingertip tight is plenty!
Using the canning tongs, gently place the filled jars of mustard pickles back into the water bath canner. Ensure there is at least 1 inch of water above the lids of the jars. This helps ensure even water temperature all around. It's normal for air bubbles to start escaping from the jars as soon as they are submerged, this is a good thing!
Bring the canning pot to a roiling boil, and process the mustard pickles for 5 minutes at altitudes below 1000ft, 10 minutes for altitudes between 1000ft -6000ft, and 15 minutes for altitudes above 6000ft. Start the time only when the pot is at a rolling boil.
Cooling & Storing
Once the mustard pickles have been processed for the proper time as indicated above, turn off the pot of water and let the jars sit until the water has stopped boiling, about 5 minutes. Then carefully remove the jars one at a time with your canning tongs, and place them on a dishtowel or rack to cool for 24 to 48 hours at room temperature. You should hear the lids pop as the jars begin to cool down, indicating an air-tight seal.
Once fully cooled, and all lids have 'popped', remove the metal ring from the jars, and ensure all lids have properly sealed. Sealed lids will slightly curve downwards, and won't move or make a clicking sound when pressed. Gently wipe the jars with a clean damp towel, and label the mustard pickles with the processing date. Leave the twist rings removed for long-term storage to prevent the lids from rusting. Store in a cool dark place for up to 8 months.