Had no idea what rutabaga was so I Googled and it's the humble sweed. Different parts of the U.K. call them turnips, but a turnip is a different vegetable...very confusing. Sweeds are yellow, hard as iron, and have a strong flavour. Nice mashed with potato and eaten with a meat gravy. Turnips, especially " snowball" variety are sweet and the last time I managed to grow a few I loved them raw. I would have thought they were highish carb, especially the sweed. Good to eat something different though......