Depending on what he likes, some spices are very good for digestion and taste quite nice: fennel, cumin, coriander, black pepper and turmeric. Not being able to eat onions, I actually now use fresh fennel in just about everything, instead of the onions. It's great!

I hope your DH is feeling well soon. I'm sure he will be with you there to care for him!

Hugs and butterflies,
~T~