Yup. Before and during rides, I use only liquid food. Ensure works, for example. I choose to go cheap and mix my own: 7 parts maltodextrin to 1 part flavored whey protein. I buy the malto in 50# bags from a homebrew supplier, the whey is Optimum Gold, which comes in 10# bags. 1 pt. of mixed powder in a water bottle will last a rider 3 hours.

After the ride, add more whey and some brown sugar to make a decent recovery beverage, or use chocolate milk or 1 pt. of regular milk with 5 T of sugar in it.

Otherwise smoothies, both fruit and vegetable work well. I had a dear friend who had adhesions after surgery. Though she didn’t ride, this is about what she did. Kale smoothies, even. There are whole smoothie cookbooks. During the day, she’d use a sports drink for a few extra calories and hydration.

Edit: To use the Ensure, drink 1 – 1.5 for breakfast. Then put 1-2 bottles in a water bottle, depending on ride length, and fill the rest with water. Plain water in the other bottle.

There are surgeons who specialize in the laproscopic repair of adhesions. You might get an opinion from a specialist in this kind of thing.