Okay, you're probably asking the same question I did when I found this: "what is a hotdish?" Well, according to several sources "hotdish" is a casserole that originated in the upper Midwest region of the U.S. (namely Minnesota, Wisconsin, North and South Dakota, and parts of eastern Montana). While the exact ingredients can vary, it usually consists of a meat, a starch, a canned or frozen vegetable, and some form of canned soup that are all mixed together in a single baking dish and served hot (as its name suggests).
Hotdish is extremely popular within the region, commonly being found at family reunions, funerals, potlucks, and church dinners, or any time a family is looking to put something filling on the table that doesn't cost a lot of money. Some refer to hotdish as being the "unofficial state dish" of Minnesota, and the Minnesota congressional delegation even sponsors an annual hotdish contest.
The first known publication of a recipe using the term "hotdish" dates back to a cookbook produced by the Grace Lutheran Church Ladies Aid in Mankato, Minnesota in 1930. The author of the recipe, Mrs. C. W. Anderson, used ingredients that were commonly available - ground beef, onion, celery, tomatoes and tomato soup, peas, and "Creamettes" (a regional brand of macaroni). This version of her original varies only in the use of rotini pasta in the place of the macaroni, but any short pasta should work fine.
Having made the dish, I can say the general taste is somewhat bland, even with salt and pepper added. Feel free to experiment with adding more spices and flavorings to suit your tastes.
Adapted from Ramshackle Pantry