I want to be friends and stay professional overall, while tapping into potential with the guy I like
These things are not really compatible. The sooner you learn that, you will have a lot less workplace drama. Your professional workplace should not be a dating pool. There is no reason to exclude the other women. Who cares if one of them lied? Are you the moral police? Just chill, and let people do what they want. You don’t need to control the situation.
Alternatively, if you really prefer the rotating menu thing you could forget the food truck and do a supper club. Typically a reservation-only, once a week or once a month thing, or whenever you have time. If you could find a small local farm to partner with, they may be able to offer you dining or cooking space in return for showing off their veggies or something.