Put all the ingredients in the food processor except for pistachios.
Mix them all at medium speed for about 3 minutes.
Add pistachios and blend for extra 2 minutes.
Notes
For a kid-friendly version of this sauce, you can go without jalapeno and still get the delicious taste of this favorite saucIf you don't like the strong taste of the cilantro leaves, you can replace the bunch cilantro with fresh herbs like dill or basil. For a more creamy texture, you can replace the cup of water with three ice cubes.You can use this sauce as a pasta sauce just like pesto or tomato sauces.