Originally Posted by kazymjir

Both my parents have removed gallbladder, my mother had it removed two months ago.

Forget about steaks and any other fat meat for a loooong time. My mother cannot eat any meat (except white meat) for half/full year (can't remember exactly for how long).
They will give you a diet. At the beginning you will only eat gruel and biscuits. About week after the surgery you will be able to eat vegetables.
Forget also about alcohol and coffee. Coffee is allowed about month and a half after surgery. About alcohol, after two moths my mother can drink weak beer (2-3%), but nothing stronger.
This diet sucks a lot and must be obey for a whole year.