Cut the meat into strips and fry in hot clarified butter. Remove from the frying fat, season with salt and pepper. Sauté the diced shallot and the sliced mushrooms and cucumber in the frying fat, deglaze with the meat stock and cream, add the meat and simmer for a few minutes. Season again with salt and pepper and place in a baking dish, sprinkle with spaetzle and cheese and bake in a preheated oven at 200 ° for about 15-20 minutes.