It might not be acceptable by your standards, but I felt proud of how well it was received by all. It saved me a ton of work, and clean up was a snap since everything could be thrown in garbage. Today's trends for weddings and wedding events are flexible, unique, and customized. I have a catering business and we have done several different types of rehearsal dinners. If you are fortunate to have family that lives nearby or very close friends, they are usually asking if they can help with anything.
Some options are lasagna, garlic bread, and salads.
Another option is to have the rehearsal dinner at your home. Several different menus can be used here. Besides wine or champagne and cheese, you could also serve other hors d'oeuvres like a veggie tray and fruit tray with dip. The main thing to keep in mind is that everyone is a little stressed and wired for the wedding. A relaxing evening before is very welcoming to the guests.