When there is a great deal of competition, the difference must be made in terms of customer service and the quality of the service offered, in this case, the taste must be exquisite. And in the case of packaged food, it can be as you say the way it is packaged.
Of course, just thinking about a venture, the first thing to consider are the legal procedures. Once you have this in place, you can proceed with the project, so you can be sure that you will not be at legal risk.
You should even have a variety of food so that people can enjoy a good menu during their week of activities. The great majority of people do not repeat the same dish weekly, they like to vary the menu.