Ingredients

4 cups fresh basil leaves (from about 3 large bunches)
1/2 cup olive oil
1/3 cup pine nuts
2 garlic cloves
1/4 cup freshly grated Parmesan cheese
1/4 cup freshly grated pecorino Sardo or Parmesan cheese
1 teaspoon coarse kosher salt

Preparation

Combine first 4 ingredients in blender. Blend until paste forms, stopping often to push down basil. Add both cheeses and salt; blend until smooth. Transfer to small bowl. (Can be made 1 day ahead. Top with 1/2 inch olive oil and chill.)