Pauline has summed it up nicely with some good suggestions. High calorie food is the answer - the things overweight people should avoid i.e. cream, full fat milk, gooey desserts, anything fatty (hope your cholesterol's OK!). It helps if you have a sweet tooth of course; if not, cream can be added to quite a few savouries like soup. Anyway, hopefully your dietician will come up with a few suggestions.
Are you very underweight Paul?
Let us know how it goes nuisance
Only joking Paul, you're never that.
PS: Thanks for asking how I am. My radiotherapy and post-rad message is on the Medications, Treatment etc. board.