Yes white potatoes are grated and go in the Irish pudding Rosyhf. The carrots are grated too. It's a really simple receipe, no exotic ingredients and can be mixed up in short order. The time consuming part is steaming it for three hours and not letting the pot boil dry or your pyrex dish cracks. The butterscotch sauce is made separately and poured over the cooked pudding. There's nothing like it. I make up batches and give them out to special people at Christmas.