Cappon magro is an elaborate and rich Genoese salad of seafood and vegetables over hard tack arranged into a decorative pyramid and dressed with a rich sauce. The foundation of a Cappon Magro is a layer of hard tack biscuits (“gallette”) rubbed with garlic and soaked in seawater and vinegar. Then a pyramid is built up layer by layer. Each layer may consist of one or many vegetables...

Source