Add water to large saucepan.
Cut stems off jalapenos then cut lengthwise on one side and remove seeds (it's best to wear gloves when handling the jalapenos and do not touch your eyes).
Place prepared jalapenos into water and bring to a boil over medium heat. Once boiling, let cook for 5 minutes.
Add garlic cloves to boiling water when there is about two minutes left.
Remove ⅓ cup of water and add to Vitamix or blender.
Drain remaining water from pan and add jalapenos and garlic to Vitamix.
Add cilantro, onions, salt, lime juice and blend on medium speed until blended then pour in oil.
Blend until combined then spoon in sour cream and continue blending until combined.
Place in an airtight container and place in fridge until chilled.