Step 1Wash parsley, basil and mint leaves and spin dry in a salad spinner.
Step 2In the bowl of a food processor, combine the parsley, basil, mint, anchovies, capers, mustard, garlic and red pepper flakes.
Step 3With the motor running, slowly add the olive oil. It should form a relatively smooth puree that is slightly chunky. Season with salt and pepper to taste. Makes 1 cup.