1/4 cup olive or vegetable oil
1 scallion, white and green parts, coarsely chopped
1 garlic clove, coarsely chopped
1 Tablespoon pine nuts, toasted
1-1/2 teaspoons fresh lemon or lime juice
1 tightly packed cup fresh cilantro leaves
1 tightly packed cup fresh parsley leaves
1/2 cup fresh grated parmesan cheese
salt and cayenne pepper

Combine everything but the salt and cayenne in a food processor or blender. Add 1/8 teaspoon salt and a few pinches cayenne pepper; puree until smooth. Season to taste with salt and cayenne.