There's a pretty lengthy thread dedicated to int'l meals.

There will be two meals - one is breakfast - which usually consists of a traditional breakfast option and some brunch/lunch options; then there is a second meal service which is usually a choice of salad, flatbread, or some such thing. Approx. 30 days before departure you'll be able to go online and choose your entree (for the 1st meal - not the second one) and that will give you a better idea what to expect.