Created by SueFreedman on January 22, 2013
Step 1: In batches, place the basil leaves, oil, pistachios, Parmesan and garlic in a blender and puree until smooth. Season with salt and pepper.
Step 2: If you not using right away, place the pesto in a container. Cover the top with a thin coat of olive oil. Refrigerate up to 2 days.