Defrost shrimps at room temperature. Melt the fat in a pot. Stir in flour and sweat briefly. Add vegetable stock and cream while stirring. Bring to the boil, cook for 1-2 minutes.
Season sauce with salt, pepper, lemon juice, honey and mustard. Wash salmon, dab dry and season with salt and pepper. Peel cucumbers, cut them lengthwise in half, remove seeds. Cut the cucumbers into slices. Wash dill, shake dry, pluck little flags from the stems and cut finely except for a little garnish. Stir the dill into the sauce. Fill cucumbers into a greased casserole dish. Place salmon on top. Pour sauce over it and spread prawns over it. Cook in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 20 minutes.
Stir the dill into the sauce. Fill cucumbers into a greased casserole dish. Place salmon on top. Pour sauce over it and spread prawns over it. Cook in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for about 20 minutes. Garnish with dill. Boiled potatoes taste good with it