While the scapes are cooking make the pesto. Roughly chop the green garlic and add to your food processor. Add the cilantro. Process until garlic and cilantro was chopped into small pieces. Add the sunflower seeds and Parmesan cheese. Process until combined, about 30 seconds. While the machine is running drizzle in ¼ cup of olive oil. If it seems too dry or lumpy, you can add a little bit more, but no more than a ¼ cup of oil more. Add in the lemon juice and process for 10 seconds to combine. Set the pesto aside.