"Everything once" was the motto when planning the gastronomy of the new Mandarin Oriental Vienna hotel. Because the listed former commercial court spans an entire street block, it was necessary to make use of the spacious atrium. A glass dome now frames the entire culinary area of the hotel. The bar and the fine dining restaurant "Le Sept" are located in the peripheral zones. And in the middle is the all-day eatery "Atelier 7" with the subtitle "Brasserie", which is also a café and breakfast area. Carinthian chef Thomas Seifried is responsible for everything - his eleven years of seafood experience from the Cayman Islands is clearly evident here. The menu also includes meat dishes such as coq au vin and the luxuriously priced steak frites "Oscar" with king crab (75 euros). Seafood - Seifried has nothing to do with freshwater fish - dominates the menu. Even at "Le Sept" next door, a magnificent hamachi dish stands out. Here, Seifried combines the fine animal "crudo" with grapes, Iberico chips and a reduced version of the Spanish almond soup Ajo Blanco. Excellent. Then more brasserie-style: octopus terrine with crunchy green beans and basquaise sauce, a strong tomato, pimiento, onion and garlic sauce. You won't find this anywhere else in Austria, just like the surprisingly successful version of cordon bleu with halibut, ham and Gruyère. If you love sole, there's no getting around the classic "grenobloise" with capers, parsley and lemon emulsion - here prepared by the kitchen. The well-placed service is just a roll of the dice. What remains to be done is something that is considered difficult in Vienna - attracting the local clientele.