The procedure for this duck gumbo with sausage and shrimp is pretty straightforward, although you're talking about a full day's project. This can be made with hundreds of different combinations of smoked meats, game, poultry, and seafood — and in my opinion, the more, the merrier. Serve in a large soup bowl with a scoop of cooked white rice, a sprinkle of green onions, and a pinch of cayenne.