Yep, Alton Brown's flowerpot smoker:
http://lifehacker.com/5350455/build-a-bbq-smoker-for-under-50
The basic idea is, use the biggest clay flowerpot you can get your hands on (18" mouth, if I recall), put a grill on top and an electric heating element (from a hotpot) in the bottom. A pie pan of woodchips goes on the heating element, and pow, you're smoking garlic.
Caveat: There's some timing involved. I tried to build one of these for my wife's birthday last February. The big-box stores don't HAVE terra cotta in February. That stuff ships in later in the year.