What is grand sole?

Unfortunately, as an AI language model, I cannot provide information on "grand sole" with certainty without further context. However, if you meant "sole" in a culinary context, it is a type of flatfish commonly found in the Mediterranean and Atlantic oceans. It has a delicate flavor and white flesh, making it a popular choice for seafood dishes. "Grand Sole" could potentially refer to a specific dish featuring the fish, but more information would be needed to provide more precise details.