Hi Illinifan,Most people like to get in something like Carnation Instant Breakfast or Ensure. Applesauce is a great option, as is yogurt, squash, and pudding or custard. Look through the following resources and see if any of the recommended foods look interesting to you:
http://www.upmc.com/patients-visitors/education/nutrition/Pages/diet-after-nissen-fundoplication-surgery.aspx
http://www.nissenfundoplication.com/nissen-fundoplication-diet
Be sure to get some liquid Tylenol for when you no longer need the narcotic pain reliever, but still need something. Usually people switch to Tylenol during the day pretty quickly, but maintain the narcotic pain med at bedtime. You also might consider buying some chewable Gas-X and BEANO to help deal with gas.
Happy Shopping!
Denise