Remove the tops from the peppers and cut them in half lengthwise. Clean out the seeds and ribs, give them a rough chop, and put them into a small saucepan. Roughly chop the onion and garlic and add it to the pan.
Pour in the vinegar and bring it to a boil. Reduce the heat and simmer for 10 minutes. In the meantime, roughly chop the cilantro and put it into a blender along with the salt and lime juice. When the jalapeno mixture is cooked, add it to the blender. *Cover the blender, put a towel over the lid, and turn it on low. Once it is going, crank it up to the highest setting and puree for 3 minutes. Strain through a medium holed strainer and let cool.
Pour into sterilized bottles and refrigerate. The hot sauce will keep for up to a month under refrigeration.
Remove liquid from the heat and allow to cool for at least 5 minutes.
Transfer liquid to a blender or food processor and fill it no more than halfway. If using a blender, release one corner of the lid. This prevents the vacuum effect that creates heat explosions.
Place a towel over the top of the machine, pulse a few times then process on high speed until smooth.
