Cook penne pasta per the package instructions.
Remove basil stalks and prep other ingredients.
In a large food processor add the basil leaves, lemon juice, garlic, salt, pepper, pine nuts, and pulse a few times to get a rough chop. Open the top and scrape down the sides.
Secure the lid, turn on low, and slowly add the oil, then add the pot water, let it process for 15-20 seconds. Stop it, open the top, and scrape down the sides again.
Secure the lid again, and turn it on high for another 20 seconds, or until the basil is in super fine pieces, and resembles specs.
Pour the pesto into a bowl, add the parmesan cheese, and mix well.
Toss the pesto with the penne coating the noodles.
Plate the penne, and top with the garnishes.