Pickled cucumber, fennel, gooseberry, tarragon and lemon salad

Method

1. Halve the cucumber lengthways. Scoop out the seeds with a teaspoon, then slice into 1cm half-moons and put in a large non-reactive (stainless steel, glass or plastic) mixing bowl. Trim and discard the base and tops from the fennel and remove any tough outer leaves. Slice the fennel bulbs from top to base, as thinly as you can (use a mandoline if you have one) and add to the bowl.
2. Add the red onion, vinegar, sugar and plenty of salt and pepper then, using a spoon or your hands, tumble everything together and set aside to marinate for 10-15 minutes.
3. Meanwhile, pick the tarragon and mint leaves and roughly chop. Add the gooseberries to the cucumber and fennel along with the lemon juice, olive oil and herbs. Tumble everything together, then serve.