Storage: Store any leftover tapenade in an airtight container in the refrigerator for up to 5 days. Bring to room temperature before serving.
Substitutions: If you prefer a milder flavor, reduce the number of anchovy fillets to 4. You can also use white wine vinegar instead of lemon juice.
Tips: For a finer texture, you can blend the tapenade ingredients in a food processor instead of using a mortar and pestle.
Variations: Add a pinch of red pepper flakes for a bit of heat, or mix in chopped fresh parsley for added color and freshness.