after this article I'm wary of the idea http://onlinelibrary.wiley.com/doi/10.1002/ptr.1281/abstract
it states "Raw garlic homogenate has been reported to exert antioxidant potential but higher doses have been shown to be toxic to the heart, liver and kidney."
sounds like a bulb can be toxic. But small amounts are beneficial. So not something you can consume for a mono-meal. Therefore not 811 approved.
I think that the best way to truly end your desire for garlic and onions is to simply go a while without eating them (30 days would be a good amount of time) If you spend 30 days or more following this diet 100% and then you suddenly try to eat some garlic or onions you will wish that you hadn't.
I used to eat them all the time as well and it wasn't until I took a break from eating them for a while that I realized the effects that they were having on me. (I enjoy a high energy, smooth digestion, and deodorant free lifestyle way too much to start eating garlic and onions again.)