For instance, you have rabbit, which you are thinking of as the last dish in your first service. And you want this to be your ROUS. Well, then, if you are swapping out the earlier stew for a sandwich--a decidedly post medieval dish--you can balance that by making a ROUS with ROUS. ;-) The soteltie is traditionally the last place in the service order, and so that would work nicely. :-)
ROUS-- a presentation version of the dish, a standing pie that has been decorated and disguised as a Rodent Of Unusual Size. This takes a trip around the feast hall for the Ooohs and Ahhs and then is served to the head table.
A dish of ROUS (Rabbit, Onions, Unguent [the sauce or gravy], Spices) served as simplified standing pies to the remaining tables.
There would be a lot of different dishes you could make with ROUS as the initials--you could be even more clever with a pie made with Rarebit, Oysters, Unagi (Eel!), Squid or shrimp--essentially, a seafood pie in a savory cheese sauce. ;-) An illusion food that completes the illusion by not having any rodent in it. ;-)
Since I have spent much time working on cheese-like sauces, and I love seafood, I think that Aunty 'Rouda's ROUS pie is going to be a dish in development Real Soon. Mixed seafood pies are pretty findable in medieval cookery, so it's a really do-able project. And I'll likely do the other version, too, but it's probably going to have to be red beans or roasted veggies or rice for the r, rather than rabbit. That'll be the totally vegan version.