I worked at a prominent meat market all through high school. Made a shitton of boudin, andouille, sausage, and other things to clog the arteries. I could walk you through it. Or take the easy road and send you a pack.
Basically you take a pork shoulder, trim the fat, cut it up, and boil it with some onions, bell peppers, and a little beef liver. Then you grind that up and mix it with rice, green onions, and some seasonings. After that you stuff the mixture in sausage casing and let it cool. When you're ready to eat it, you can boil it, grill it (my favorite), or smoke it (my favorite as well). Pm me if you want me to send you a pack.