Black garlic - but you don't grow it
This is a different process - fermenting. It sounds a bit complicated, but maybe worth it, although I can't imagine anyone wanting sweet tasting garlic. But to each his own.
https://www.gardeningknowhow.com/edible/herbs/garlic/how-to-make-black-garlic.htm
A government which robs Peter to
pay Paul can always depend on
the support of Paul. -- George Bernard Shaw