Roxs, I have seen you post quite a few questions lately, and why there is nothing wrong with asking, a lot of the information you seek is readily available on this site. I am pretty new to this site and used to to do the same thing at first. I soon realized that through the Fishing Maps and Fish Species pages you can find a lot of information. Most important is recent updates from fellow anglers.
Straight from the Brook Trout section through the Fish Species tab
"Brook trout are voracious feeders consuming zooplankton, crustaceans, worms, fish, terrestrial insects, and aquatic insects. They frequently feed on whatever is most readily available. This feature makes them extremely popular with anglers and they will readily take a wide variety of flies and lures."
It has been said many times before but there is no better way to figure it out then to get out there and try! In my experience sometimes the best way to figure what to use and how to use it has come from multiple failed attempts.
Good luck to you sir! Never had one through the ice but Brookies sure are a whole lot of fun IMO. If you can find a good spot it can be non-stop action!