Begin by cooking your organic chicken breasts. When done, allow to cool before shredding with two forks (optional).
Whisk 1 tsp oil with the tarragon and lemon juice and season well. Add the shredded chicken and leave to marinate.
Heat a pan to very hot. Blanch the leeks and fennel in boiling salted water for 90 seconds before draining. Coat the leeks and fennel slices with 1 tsp oil and season. Cook the veg in batches, and sear until charred but still soft. Then add to a plate with the chicken and beans. Serve scattered with parsley and some lemon wedges to squeeze over.