Peel the langoustines and remove the heads. Remove the black spine using the tip of a knife.
Use a knife to peel and remove the pith from the oranges and grapefruits, then remove each segment from the fruit.
Heat the honey and the citrus segments in a frying pan. When this mixture is warm, add the edible flowers and the coriander.
Add a dash of olive oil to another frying pan. Wait until the pan is very hot and then sear the langoustines for 1 minute on each side.
Serve langoustines on top of the citrus salad and decorate with a few petals.
«Make sure you use a sharp knife.»