Step 1To make the dressing, place all of the ingredients in a mortar and crush with a pestle (olive oil, lemon juice, chopped anchovy fillets, capers, sliced garlic, pepper and chopped parsley). Alternatively, finely chop all of the ingredients and place everything in a small jar. Close with a lid and then shake until well combined.
Step 2Wash the greens and place in a salad spinner to drain. Place in a bowl and add the sliced onion.