Traditional pesto recipe from the Silver Palate Cookbook.

Directions: 
  1. Combine basil, garlic and walnuts in the bowl of a food processor-or halve the recipe and use a blender-and chop. Leave the motor running and add the olive oil in a slow, steady stream. 
  2. Shut the motor off, add the cheeses (I leave this out to add at the table), a big pinch of salt and a liberal grinding of pepper. Process briefly to combine, then scrape out into a bowl and cover until ready to use.
Yield: 
2 cups
Time: 
30m
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