Wash the oranges in hot water, dry them and peel them in fine strips. Cut an orange in half and squeeze one half. Peel the remaining oranges so that the white skin is completely removed.
Cut oranges into thin slices. For the sauce, dissolve the crab paste in approx. 100 ml of hot water. Mix with crème fraîche, 1 tablespoon orange juice, orange peel and green pepper. Season to taste with salt and pepper.
Wash the fish and dab dry. Sprinkle with 1-2 tbsp. orange juice, season with salt and pepper.
Preheat oven (electric cooker: 200°C/circulating air: 175°C/gas: level 3). Grease two small ovenproof moulds or one large mould. Spread orange slices in it and place the fish on top. Spread the sauce over the fish.
Cook in a hot oven for 12-15 minutes. Rice tastes good with it.