Blend all ingredients in a blender, adding a bit of water as necessary to make a paste:
3 cups chopped coriander leaves (cilantro)
5 green chiles
1 teaspoon ground corriander
1 teaspoon ground cumin
3 tablespoons lemon juice
1 clove garlic, chopped
salt to taste (optional)
This makes about a dozen or two small servings. You should store it in jars in the refrigerator, preferably letting the flavors mingle for a few hours or days before using. It's also fine right away, though.