With a very sharp knife insert about 2" in, about 10 times all over the outside of the skin to vent so it doesn't explode.
Set on a baking sheet and put into a preheated oven at 425 degrees F for 60 minutes for about 4 lbs., to 1 hour 30 minutes for closer to 6 lbs.
Remove, slice lengthwise with sharp knife. If you feel it is not tender enough, set with flesh side down on baking sheet lined with parchment paper for another 15 min., then check again.
When tender use a fork to scrape the "noodles" out and enjoy.