There are a couple of side dishes that I know of that are simple and easy to prepare. One is to serve french-fries with the tilapia fillet.I usually fry the fish fillets too and serve the whole thing with ketchup and tartar sauce. If you want to add a little zing to the meal offer some banana peppers on the side. Another option is to simply fix a salad. It does not have to be something fancy. Just mix together some lettuce, tomatoes, onions or whatever you like.