Pasta: Cook the pasta according to package directions.
Herbs: Wash the basil and cilantro and remove thicker stems.
Nuts: Crush the pine nuts in a food processor or with a knife.
Blend: Add the basil, cilantro, avocado flesh, lemon juice, ground coriander (if using), garlic powder, salt, and water to the food processor (or to a bowl if using an immersion blender). Blend until smooth.
Serve: Drain the cooked pasta and add it back to the pot. Stir in the avocado sauce. Serve with more basil and cilantro.