1-Prepare garlic scapes by trimming just below: Prepare garlic scapes by trimming just below the bulb and woody ends. Chop remaining scape into 1-inch pieces.
2-In a high speed blender or food: In a high speed blender or food processor, add garlic scapes and basil and pulse to combine.
3-Add walnuts and pulse until combined: Add walnuts and pulse until combined. Scrape down the sides of the blender / food processor as needed.
4-With the blender or food processor running,: With the blender or food processor running, stream in the olive until emulsified and pesto looks uniform.
5-Add parmesan cheese and lemon juice and: Add parmesan cheese and lemon juice and blend until combined.
6-Season with salt and pepper, to taste: Season with salt and pepper, to taste.