Using a food processor, chop up pecans until they are finely ground. Don't over process.
Move chopped pecans to a bowel. Add brown sugar and nutmeg.
Melt butter and add to the dry mix. Then stir well until butter is thoroughly incorporated.
Press pie crust mix into a cast iron pie skillet.
Bake pie crust for 12 minutes at 350 degrees, or until brown.