Ingredients

3 cups tightly packed fresh basil leaves (2 ounces total) 

3 tablespoons walnut pieces 

3 tablespoons grated Parmesan cheese 

2 garlic cloves, peeled 

1 tablespoon fresh lemon juice 

Coarse salt and ground pepper 

3 tablespoons extra-virgin olive oil

Preparation

In a food processor, combine basil, walnuts, Parmesan, garlic, lemon juice, and 3 tablespoons water; season with salt and pepper. Puree until a paste forms.

With motor running, add oil in a thin stream. Process until very smooth, about 1 minute.