Add lemon juice, chopped garlic scapes, basil, and radish greens to food processor. Pulse for about 45 seconds or until a finely minced consistency begins to form.
Add walnuts, nutritional yeast and shallot. Pulse until crumbly and well-combined.
Drizzle in olive oil slowly while running the food processor.
Taste. Add salt and pepper if needed. Toss with pasta, spread on a sandwich or serve with hummus