In a food processor, add the cilantro, garlic, Greek yogurt, mayonnaise, lime juice, ground cumin, and season with salt and black pepper. Secure the lid tightly.

Pulse the food processor for about 30 seconds until the mixture is well combined and reaches a smooth texture. Scrape down the sides as needed.

To adjust thickness, add water while processing. Blend until the desired consistency is reached.

Taste the sauce and adjust seasoning with more salt or lime juice if needed.

Transfer the sauce to an airtight container and let it rest in the refrigerator for about 30 minutes before serving.