Step 1

For the cocktail sauce, whisk together mayonnaise, yoghurt, tomato sauce, lemon juice and some sea salt and freshly ground black pepper in a bowl. Taste and adjust to your liking. Set aside.

Step 2

Take the greenest leaves from the iceberg lettuce, roll them up and thinly slice into shreds.

Step 3

To serve, top each crispbread with a tiny smear of cocktail sauce, a good pinch of shredded lettuce and a prawn. Drizzle with remaining cocktail sauce, top with a parsley leaf and serve with lemon wedges.