Slice the jalapeños: Wearing gloves, slice the jalapeños into ¼ inch rounds. Be sure to remove the stems and discard any rotten or damaged peppers.
Prepare the brine: In a large pot, combine the vinegar, sugar, turmeric, celery seed and minced garlic. Bring the mixture to a boil and stir until the sugar has completely dissolved.
Add the jalapeños: Once the brine is boiling, add the sliced jalapeños and stir to combine. Allow the mixture to cook for 7-10 minutes, stirring occasionally.
Sterilize your jars and lids: While the jalapeños are cooking, sterilize your canning jars and lids. You can do this by boiling them in water for 10 minutes or running them through a dishwasher cycle.
To sterlize your jars and lids in the Instant Pot, place 1 cup of water, 2 teaspoons of vinegar and the trivet in the Instant Pot. Then place your jars and lids onto the trivet. Pressure cook for 5 minutes.
Fill your jars: Using a slotted spoon, transfer the jalapeños to your sterilized jars, leaving about ¼ inch of headspace at the top of each jar.
Fill with brine: Simmer the leftover brine for a few minutes before transferring them to the jars. Once the jalapeños are in the jars, use a ladle to pour the brine over them, making sure to leave ¼ inch of headspace at the top of each jar.
Remove air bubbles: Use a chopstick or a plastic spatula to remove any air bubbles that may have formed in the jar.
Wipe the rims: Using a clean, damp cloth, wipe the rims of the jars to remove any excess brine or debris.
Add lids and rings: Place the lids on the jars and tighten the rings until they are snug, but not too tight.
Steam canning in Instant Pot: Add 3 cups of water to the Instant Pot and insert the trivet. Bring the water to a boil using the saute function. Then carefully place the jars onto the trivet using a jar lifter. Close the Instant Pot lid, turn the valve to the "Venting" position, and press the Steam function button. Adjust the time to 15 minutes. Once the time has elapsed, turn off the Instant Pot and open the lid. Remove jars and let cool: Carefully remove the jars from the Instant Pot after 5 minutes and place them on a cooling rack to cool for up to 24 hours. Once they are cool, check the seals by pressing on the center of the lids. If they do not pop back up, the jars are sealed and can be stored in a cool, dry place for up to a year.