This one is made by Les Blank and is all about garlic including the Gilroy Garlic Festival (California). It was filmed in the late 70's and came out in 1980.
You will be pleasantly surprised by a young Alice Waters and Chez Panisse making the scene, a young Ruth Reichl, and even Werner Herzog with a cameo. There is even a special thanks to Marion Cunningham.
It is dated, of course, but does cover some history of garlic as well as folk uses. There are many scenes of MANY garlic cloves in a recipe that got me to really pay attention to a few of the recipes.
I really enjoyed it and would recommend it if you enjoy garlic.
Have you seen it? I found it on Hulu.