Amêijoa, A Classic Of Portuguese Cuisine Land of sailors and fishermen, Portugal has in the sea one of its greatest riches, if not the greatest, and what it manages to take from it reveals unforgettable experiences. The clam is a nutritious shellfish that is high in protein, minerals, vitamins and omega-3 fatty acids. They can be both a starter and an aperitif or the perfect accompaniment to the main course.