Step 1

In a food processor, combine the pine nuts, garlic, salt, and pepper and pulse until well chopped. Add the lemon juice and pulse again.

Step 2

Add the radish greens and basil and pulse until combined.

Step 3

With the food processor running, drizzle in the olive oil and pulse until combined. Add the Parmesan cheese, if using, and pulse briefly to combine. For a smoother pesto, add more olive oil.