it will take 20 to 30 minutes. make sure that you check regularly to see if it is done! poke a fork in the filet if there is resistance, it needs to cook longer. it should be so tender as to fall apart in your mouth.
i came across this recipe and thought i would give it a try. it was the best fish i have ever had. the instructions to make it are easy to follow and thorough. i will definitely pass this recipe along to friends as well as make it again! 