Here's an  easy recipe for cooking fish in the microwave.  A word of CAUTION before I start.  This works on non-oily fish only!  Do not try with trout or Salmon.  A friend did and the fillets exploded all over the inside of the microwave!  It works best on panfish, bass and walleye.
Marinate the fillets in lemon pepper or Teriyaki marinade for 1 hour.
Get a ribbed microwave dish, the type you would cook hamburgers on. 
Place the fillets on the dish in a single layer and cover with waxed paper (very important).
Cook for 5 minutes on high (based on a 1000Watt microwave oven - time may need to be adjusted slightly for different power ovens).  Serve with rice or your other favorite dish and enjoy
Good luck and God bless!  Norm