Grill jalapeno peppers on all sides until charred (it can take 5 minutes per side), remove to a glass bowl and cover the bowl with plastic wrap or a plate. When cool enough to handle, peel and remove core and seeds.
Place in the food processor or blender.
To the processor or blender, add garlic, cilantro, and parsley, oil, salt, and pepper. Pulse until chopped NOT PUREED; you should have pieces remaining in the mixture (large and small). Alternatively, you can hand chop everything and add to oil.
Transfer to jar and use as needed.This can be stored in the fridge for a few weeks.