Toast pepitas in a skillet over medium heat, until lightly browned and fragrant, about 4 minutes. Set aside to cool.
Add radish greens, cilantro, Parmesan, Manchego, garlic, coriander, pepper, salt and cooled pepitas to the bowl of a food processor.
Pulse until mixture is minced; scrape down sides of bowl.
With processor running, slowly stream in oil.
Season with additional salt and pepper to taste.
Use as desired or store in an airtight container in the refrigerator for up to 1 week.