A Look Inside Ametsa With Arzak Instruction in London AMBASSADOR CHICAGO $126 ($̶2̶3̶4̶) - Updated 2022 Prices & Hotel Reviews - IL - Tripadvisor. Ametsa or to give it its full title Ametsa with Arzak Instruction (see our review) is brasserie than a fine dining approach it is getting great reviews. On Thursday my friend Henry and I went for dinner at Ametsa with Arzak Instruction, which is a Basque restaurant in The Halkin Hotel in Belgravia.Ametsa with Arzak Instruction, this restaurant feels that the service is still very good. I sweep the bread crumbs at any time during the meal.