Vieiras en su concha is a traditional dish originating from Galicia, consisting of scallops served in their shells. The dish is usually made with a combination of scallops, olive oil, onions, garlic, pimentón, white wine, tomato sauce, salt, pepper, breadcrumbs, and parsley.
The garlic, onions, and pimentón are sautéed in olive oil, then covered with wine, tomato sauce, and seasonings in order to create a sauce. The scallops are boiled and arranged on a baking sheet in their shells, then topped with the tomato mixture, breadcrumbs, and parsley.