What does mason pla mean in cooking?

Mason Pla: This popular Thai dish features steamed fish topped with a delicious sauce made from garlic, shallots, chillies, fish sauce, soy sauce, sugar and lime juice. The fish is usually placed on a bed of vegetables for steaming, such as Chinese broccoli, cabbages or carrots. The resulting meal combines a balance of spicy, sour, salty and sweet flavours, while the vegetables absorb the flavours from the steaming sauce adding another dimension to the dish. Mason *Pla* is widely loved for its complexity of flavours and ease of preparation making it a favourite among home cooks across Thailand.