Prepare 4 pint jars (I used 2 pints and 4 half pints), lids, and rings. Sterilize the jars and keep them in the hot water till it’s time for processing. Make sure to fill your water bath canner and get the water to a simmer. Using a food processor or knife mince jalapenos, garlic, and onion. Prepare your tomatoes.
In a large stainless steel or enameled dutch oven combine all the ingredients. Bring to a boil gently, stirring often, then reduce to a simmer for 20 until the liquid is reduced by half. Remove from heat.
Filling the jars:
On a dishtowel place your hot jars and using your funnel in each jar fill leaving 1/2” headspace. Remove air bubbles and refill to the proper headspace if necessary.
Taking a clean papertowel wet it with warm water and wipe the rims of the jars removing any food particles that would interfere with a good seal.
Using your magic wand extract the lids from the hot water and place them on the now cleaned rims. Add your rings to the tops of each of the jars and turn to seal just "finger tight".
Make sure your rack is on the bottom of the canner and place the jars in the water bath making sure that the water covers each of the jars by 1 to 2 inches. Add hot water to the canner if it doesn't measure up.
Cover the pot and turn up the heat under the canner and wait for the water to start boiling. Once the water has come to a boil start your timer for 15 minutes.
When complete turn off the heat and remove the cover and let the jars sit for another few minutes.
Remove the jars and place them back on the dishtowel in a place that they will sit overnight to cool. Do not touch or move them till the next morning.
Sometime in the next hour your jars will be making a "pinging" or "popping" noise. That is the glass cooling and the reaction of the lids being sucked into the jar for proper sealing. Some recipes may take overnight to seal. Check your lids and reprocess any jars that did not seal.
Make sure to label your jars after they have cooled with the name of the recipe and the date canned.