Dalloyau is a cafe in the Gateway Arcade at Harbour City in Tsim Sha Tsui, Hong Kong, serving French pastries, cakes and coffee. Its signature Opera cake layers coffee-soaked almond sponge, coffee buttercream and 70% chocolate into an eight-layer dessert. Chef Cyriaque Gavillon of Dalloyau first created the cake in 1955. Prices are on the high side.