• In a high speed food processor, add garlic scapes, basil, walnuts, parmesan cheese, lemon juice and pulse until combined.
• With the blender or food processor running, stream in the olive oil. Scrape down the sides of the blender and continue blending as needed until the olive oil is emulsified and the pesto looks uniform.
• Season with salt and pepper, to taste.
• Fill Bella mushrooms with pesto.

Walnuts

• Preheat oven to 350 degrees.
• Line a rimmed baking sheet with parchment paper or foil for easy cleanup. Toss walnuts in oil, salt, and pepper if desired. Arrange in a single layer on prepared baking sheet. Toast until browned and fragrant, stirring occasionally, about 7 to 10 minutes. Remove from oven and chop.
• Sprinkle with filled mushrooms with toasted walnuts and Parmesan cheese. Enjoy!