Roast the Anaheim chilies either on a grill, under a broiler, or air fryer until the skin is nice and charred. Peel the skin and remove the seeds.
Put all ingredients, minus the water and the cilantro, in a blender and blend until smooth. Depending on the size of your blender, you may need to do this in batches or by adding the ingredients slowly. If you are using a food processor, make sure you let it run long enought o pulverize all the pepita.
Add cilantro last, and blend again. If it is too thick, add a little water. Taste and adjust for salt, pepper, and acidity. You can add a squeeze of lime or more red wine vinegar to suit your taste.