Prepare the dressing first. Take a small mixing bowl and mix together oil, lemon juice and freshly ground pepper. You will not need any salt as the gherkins and olives have salt content. Add the red onion to the bowl and stir to coat. Now add the remaining dressing ingredients. Mix everything together and set aside for use in later parts of the recipe.
Put water in a saucepan and cook the beans in it for around three minutes. Add a little salt to the boiling water. Remove from heat when the beans get tender and drain out in a sieve. Cool them out under running water. Cut the beans in half and put them in a large salad bowl. Add the seafood, gherkins and olives to the bowl and toss together everything. Pour the dressing over this salad and mix everything together.
De-leaf the chicory and arrange the leaves on the side of the salad. Serve immediately.