Gosh, there are so many! I'd have to say my fave is Frogmore stew, also known as "Lowcountry boil." In a big pot, you cook potatoes, corn on the cob, sausage, and shrimp together, along with lots of spices. I think I have a hub about it that includes the precise recipe. Red beans, sausage, and rice is another one-pot winner!