Lay a long piece of aluminum foil over grill surface.
Fill cake pan 1” deep with salt.
Fill smoker tube with wood pellets
Place smoker tube on grill grates and light top pellets with propane torch. Ensuring you have a good flame established.
Wait 5-10 minutes for flame to die down and make sure pellets are smoldering like you want them to. Use tongs to lay smoker tube on its side on foil
Place pan with salt next to smoker tube.
Tent pan and tube with 18-24” piece of doubled foil that has been folded down the middle to make a wide piece of foil.
Leave salt 30 minutes to 1 hour then return to stir and check its progress.
Repeat this stirring process every hour or so for 4-5 hours depending on how long your smoke tube lasts