It's a ham and is cured in a brine.
We used to have them a lot when I was growing up. You put the cottage roll in a pot of water, along with potatoes, carrots, onions, cabbage, etc. and let it simmer for hours. It's very tasty!
I hadn't made one in a while so today was the day! Since I've become a recent fan of the crockpot, I made it in there. I'm not a fan of cabbage so left it out.
Just before it's time to serve it, I put it in the oven for a bit with a brown sugar/mustard glaze.