Wash the cucumber and cut into approx. 2 - 2.5 cm thick slices. Then cut out a hemisphere from the center of the cucumber pieces with a ball cutter.
Briefly fry one shrimp on both sides for each piece of cucumber and season with salt. While the prawns are cooling, puree the creme fraîche with the finely chopped garlic and season with salt.
Finally, fill each cucumber piece with garlic sauce and top with a shrimp on the edge.