Their pretty easy to construct . Pick a big fat one, cut aprox. 1/2 inch from each end, using a spoon or knife hollow out bowl from big end not too deep. Then with either a large ice pick or stiff wire run it thru the bowl to the other end being careful not to spit the veg. Voila. it's best to use slightly loose or leafy smoking material so as not to get a mouthful of unburt material.