Finely slice the onion.
Cut 1 cm off the hard end of the chicory then take the leaves apart.
Peel the oranges (the white membrane too) and cut them into 1cm slices. Collect their juices into a small bowl.
Arrange the orange slices and chicory leaves on a large serving plate. Scatter the herbs all over them.
Dry-fry the walnuts then cut them into small bits. Scatter these on top of the salad then crumble the feta on top.
Mix the dressing, add the orange juice then taste. If not sweet enough, add some honey.
Drizzle the salad with the dressing just before serving.