OK, I'll admit to being selfish here. During the pre-op clear liquid phase (just 2 days) I asked my family to eat dinners out. I was soooo hungry. After the surgery, it wasn't nearly so challenging. But still, if you can avoid cooking foods that smell really deliscious and have to cook for hours, that would be kind. (Smelling chili cooking for 3 hours just about did me in!) Depending on his doctor, he may be on liquids for 2 weeks or longer after the surgery. I found that to be the hardest time. Once I could get something even a bit solid, like applesauce, it wasn't so bad. A lot will depend on whether he experiences a lot of nausea, too.
Good luck to you both!