Add all of the ingredients to blender or food processor and blend until thoroughly combined. Salt to taste.
Add to airtight container and store in fridge.
Notes
Toast the peanuts which adds a rich, roasted flavor to the pesto.
If you want a thinner pesto, add 1 tablespoon of water at a time.
Increase the crushed red pepper flakes by ¼ teaspoon if you like more heat.
If you don't want your pesto to turn brown, pour a small layer of olive oil over top and store in an airtight container in the fridge for one week. You can also freeze for up to 3 months.