Did the iron age Celts use seasoning

As the Celts spanned the majority of Western Europe before the Romans took their land and intergrated them into their empire (with varying degrees of success), they would have been aware of certain items that could be used as seasoning. Certainly they would have used salt as a preservative for meats rather than as a seasoning. When the meat was cooked after being preserved with salt, it would have tasted very salty indeed so seasonings would have been used to try and mask the taste of the salt.