In a food processor, in batches, process the basil leaves until chopped. Add thegarlic and nuts and pulse about 6 to 8 times. Add about half of the olive oil pulse until blended. With the processor running, ad the remaining olive oil in a steady stream. Add the Parmesan cheese and process until well blended. Taste and add salt and pepper, as needed.
Makes about 1 cup of pesto.
Calories per serving: about 158 per 2 tablespoons