Combine the baby spinach, parsley, pistachios, oregano, garlic, ½ teaspoon salt and the pepper in a blender or food processor; pulse until coarsely ground, scraping down the sides as needed.
Place the pignoli, lemon juice, nutritional yeast, and salt in a food processor, and pulse a few times, until thoroughly combined. Gradually add 6 tablespoons water, and pulse until the texture ...