They’re making healthy AND delicious plant-based (i.e. vegan) foods. They started working on recipes and working on branding, website, etc at the beginning of this year.
Yup, them and about thousands of others, at farmer's markets, flea markets, etc all around the country.
Selling a few portions of whatever food at a farmer's market is one thing. Having a real business is quite another.
"Vegan food" isn't exactly a new idea. Not only will you be competing with thousands of other amateurs like yourself, you'll be competing with multi-national corporations if you grow the business much beyond the "selling a few off the back of a truck" stage.
Unless you have something truly unique (highly unlikely), truly fantastic and far beyond what the others have (again, highly unlikely), have plenty of big money backing, have an experienced management team, and have the "unique" part patented (because otherwise, the "big guys" will come in and squash you like a bug if you ever get big enough that they notice you), you will find it extremely difficult to go beyond selling a few items locally.
Sometimes a good, small, part-time business that makes you a little extra money on the side is best left as just that.
Many people get excited by the fact that someone is actually willing to buy their stuff, go nuts thinking they will be the next "big thing," and end up as road kill, with piles of debt and smashed dreams.
That said, have at it! :)