Francesinha de Marisco is a seafood version of the classic Francesinha sandwich. It is made with a variety of seafood, such as shrimp, mussels, and squid, along with the traditional ham, linguiça, and melted cheese. The sandwich is then topped with a seafood sauce and grilled until the cheese is melted and bubbly. Francesinha de Marisco is a delicious and indulgent dish for seafood lovers.