To make this dairy-free and vegan:
¼ cup vegenaise
¾ cup raw cashews soaked in water for 3 hours, then drained
1 cup fresh water
2 Tablespoons lemon juice
½ teaspoon Dijon mustard
1 medium clove garlic, grated or minced
1 teaspoon sea salt
freshly ground black pepper to taste
pinch of cayenne pepper
2 Tablespoon chopped fresh chives or 1 scallion, finely chopped
2 Tablespoons flat-leaf parsley leaves, finely chopped
Place everything except the herbs into a high-powered blender or food processor and blend until creamy. Stir in the herbs by hand and transfer to a container.