For a thicker sauce, chop cilantro and garlic and place in a blender. Puree with 1/4 cup water and the oil. Add lime juice, cayenne pepper, coriander and salt.
For a thinner sauce, chop cilantro and garlic very finely. Then stir in 1/4 cup water, oil, lime juice, cayenne pepper, coriander and salt.
The emulsified version can be served as a dip with pita bread. Serve the thinner version with fried halloumi or other fried cheese, vegetable fritters or with a salad.