Halve the zucchini lengthways, hollow out and add plenty of salt on the inside. Place with the cut surface facing down to drain for approx. 30 minutes.
Then rinse and pat dry. Finely chop the salmon. Finely chop the mushrooms with the hollowed out zucchini meat and sweat in oil until the liquid evaporates. Salt, pepper and let cool. Then mix with egg, dill, salmon and sour cream. Pour the mixture into the hollowed out zucchini.
Bake in a preheated oven at 200 ° C for about 20 minutes. Serve warm.