Cargols a la Llauna is a traditional Catalan dish consisting of grilled or roasted snails. The snails are typically marinated in a mixture of olive oil, garlic, parsley, and other herbs and spices, and then cooked in a special llauna (metal baking tray) over an open flame or in the oven. Cargols a la Llauna is a popular dish during the spring and summer months.