There you go you see.....they're not swedes they're turnips!
Ah well...
The traditional Cornish pasty, which has Protected Geographical Indication (PGI) status in Europe, is filled with beef, sliced or diced potato, swede (also known as a yellow turnip or rutabaga – referred to in Cornwall as turnip) and onion, seasoned with salt and pepper, and is baked. (Wiki)