Add water to a large size pot and bring to a rapid boil.
With the stem on, add the fresno chili peppers & garlic cloves. Boil for 2 minutes and rinse with cold water.
Cut the stems off the fresno chili peppers and chop in half.
Add the fresno chili peppers, garlic cloves, rice vinegar & salt to a food processor or blender (the more seeds, the hotter this will be. If you want less heat, remove some of the seeds).
Pulse several times until you have a coarse paste.
Poor the pureed mixture into a sauce pan and bring to a boil.
Turn heat down and simmer for 10 minutes, or until the raw pepper smell has dissipated.
Remove from heat and let cool.
Let the flavors meld for 2 hours before serving.
Recipe by Astro Eater at http://www.astroeater.com/atomic-chili-garlic-sauce/