Instructions: * The cheese is optional but, if using, use a hard cheese and grate. Use a food processor for easiest preparation.

Chop basil leaves in food processor or blender until finely chopped. Mix the basil with chopped walnuts, minced garlic and cheese in the processor or blender. While machine is running, slowly pour in a thin stream of oil.

Continue blending until desired consistency. Add black pepper.

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