My friend found his on Kijiji, the Québécois version of Craigslist 

You can also sign up as a ghost kitchen on Uber Eats / DoorDash and deliver the meals with a  promo code to incentivize customers to subscribe to your service

Be sure to let it be known that you offer menus tailored to each client’s needs, otherwise picky eaters and people on strict diets will not see the appeal