Ralph & Kacoo's was a local, Louisiana restaurant that has changed hands several times. This is one of their original recipes that I'd saved from their newsletter from 1995 and was always one of my favorite dishes containing a variety of seafood (shrimp, oysters, crawfish) and a spicy Cajun ham called "Tasso".
NOTE REGARDING TASSO: [TAH-soh; TA-soh] Much to the disappointment of many, this Cajun specialty is generally hard to find outside Louisiana. Tasso is a lean chunk of cured pork (usually shoulder) or beef that's been richly seasoned with ingredients such as red pepper, garlic, filé powder and any of several other herbs or spices, depending on the manufacturer. It's then smoked for about (again, depending on the cook) 2 days. The result is a firm, smoky and flavorfully tangy meat that is principally used for seasoning. Outside of Cajun country, tasso is available in some specialty gourmet shops and by mail order.
If you can't find Tasso in your area, use a strong smoked ham. Or just move down here to Louisiana.