I've seen recipes for a slow cooker beef stew casserole that interested me. I'm not sure what you'd do for a topping, or if there is one, if you go that route. Maybe that would be the serve over rice version. In that case, you'd want to leave out the potatoes. Serving it over mashed potatoes would be good, too.
A cornbread crust would be good -- especially one with a little cheese, or maybe a Mexican cornbread crust to spice it up a bit. Going with a Mexican flavor would be really easy, now that I think about it, too. You could just add some taco seasoning and a can of green chiles and do the Mexican cornbread crust. That actually sounds pretty good. I may have to try something along those lines.
Easy meals are always in demand at my house, so this might be something I'll want to pursue further.