Black Garlic maybe? But it's energy intensive, because it needs constant high temperatures for months.
Saying this because I recently discovered it, and like it, because it's basically garlic without the 'stink', useful for spicing up many things, again without the stink. Hard to describe. Anyways, it's seen as a gourmet thing. So one maybe could make some money with it, without much volume. OTOH energy isn't getting cheaper. Dunno. See and search for yourself.
Saying this because I recently discovered it, and like it, because it's basically garlic without the 'stink', useful for spicing up many things, again without the stink. Hard to describe. Anyways, it's seen as a gourmet thing. So one maybe could make some money with it, without much volume. OTOH energy isn't getting cheaper. Dunno. See and search for yourself.
https://en.wikipedia.org/wiki/Black_garlic