Wash the organic orange hot, dry and finely grate half of the peel. Peel the other half of the peel with a pestle ripper in fine strips or peel it thinly and cut it into fine strips.
Peel all oranges so thickly that the white skin is completely removed. Remove the fillets with a sharp knife between the parting skins. Squeeze the juice out of the parting skins and collect it.
Mix yoghurt, salad cream, orange juice and grated zest. Season with salt, pepper and sugar.
Clean the salad, wash and spin dry. Pluck radicchio into pieces. Peel and finely chop the onion. Mix salad, orange filets and onion.
Arrange in four bowls or on plates. Spread the yoghurt sauce over it and garnish with orange strips. Baguette tastes good with it.