Toast pecan halves in a dry pan on medium-low for 4 to 5 minutes. Remove from pan. Turn heat to medium. Add the butter, brown sugar, cinnamon, salt and water. Stir until the sugar is dissolved then add the pecans to the syrup. Stir the nuts and the syrup together for another 4 or so minutes until the syrup is thick and the nuts are well coated. Pour onto a baking sheet lined with parchment. Bake the nuts for 7 minutes at 350. Allow them to cool completely then transfer to an airtight container.