It's best slightly blanched over raw. It's harder for your body to process the nutrients when it's raw. Most leafy greens (the darker the better) are a good source of both calcium and iron, as well as many other nutrients.
I have to admit, I ate some boudin balls in SE Texas (which is basically SW Louisiana and very cajun) that were pretty good. It was boudin sausage and some other stuff rolled, breaded, and deep fried. I am guessing there wasn't much liver in it because I did not know it had liver in it until after I ate them. I would eat those again I think, as long as it came from Judice's in Bridge City, Texas.