At this time, the best way to include longer descriptions or multiple courses is by creating abbreviated selections for each entry or course combination.
For example, “soup/chick/pie”, “salad/chick/mousse”, “soup/beef/pie”, and so on. Additionally, you might consider providing detailed descriptions of the meal selections in the RSVP event description (note that if you have only one event entry, place this information under Event Description not the Introduction Text to have it show up on the RSVP page properly).
Having greater character allowance and/or the option to assign multiple course selections within the meal preferences feature are both popular requests and on our list of suggestions for potential future improvements. However, at this time, you are limited by the number of characters allowed in the meal preference field.