Protein is good for rebuilding the good cells, so eggs are great.
Some say not to eat your favroite meals, because you may lose taste for them post chemo.
It is very important to stay hydrated during the entire process- lots of gateraid, water, all and any kinds of fluids. Even a stout beer at night, if the doc permits it.
Keep in mind, anything coming out of his body will be toxic. Sweat, urine, and such- need to be cleaned up right away. If you have kids or pets, try to have him use his own bathroom.
I think if I had to go through it again, I would eat lots of grilled cheese and tomato soup. Nothing too spicy though. (Yummy ice cream would be the perfect thing for him to work off on next years LAF Challenge!)