In a medium bowl, combine all ingredients except cilantro.
Use an immersion blender to blend dressing until mostly smooth. (Alternatively, use a Nutribullet or small food processor.)
Add cilantro and blend again until green specks are disbursed throughout the dressing. (Don't overblend or the dressing will turn green.)
Dressing will be thick. Refrigerate in a storage container or sealed jar for up to 2 weeks.
