Casquinhas de siri is a traditional dish consisting of creamy crab cakes served on a shell. It's made with a combination of crab meat, breadcrumbs, coconut milk, tomatoes, onions, yucca flour, green onions, cilantro, and parsley. The mixture is spooned into shells, then baked until golden brown.

The casquinhas are sometimes served over shredded lettuce, and they're usually garnished with lime wedges and accompanied by hot pepper sauce on the side. The dish is served piping hot as an appetizer or a bar snack.