We used to get Homeroom catered to our company so I'm pretty familiar.
Its pretty delicious but also really heavy. I noticed that it was difficult finding something that I'd want to eat on a recurring basis, and that must have been uniform because we stopped getting catering from them after 6 months or so.
I'm curious to know if you've seen recurring business from customers or just getting new business because its a new concept and people love mac and cheese and want to try.
While there are trends in fast casual, I'd say there are also trends in healthier eating. Have you thought about how to provide healthier / lighter options to encourage more habitual ordering from existing customers?
Also another idea is food trucks as mobile storefront. A pizza truck a block away from me bought access to an unused parking lot, and while they do provide walk-ups, the majority of orders are fulfilled by delivery companies. Since they are located in a parking lot on a busy street, I will often see 4-5 Uber / Postmates / Eat24 cars lined up waiting for their quick-fire pizzas.