Wash the chicory, remove the outer leaves. Quarter the perennials lengthways. Wash the thyme, shake dry, pick off the leaves.
Peel the oranges like apples, peeling off the white skin as well. Collect the juice. Detach the fruit segments from the skins.
Heat the butter in a pan, sprinkle with the thyme leaves. Fry the chicory on all sides, deglaze with the orange juice, add the orange fillets. Salt and pepper. Cover and cook the chicory over a medium heat for 12-15 minutes.