The menu's do change periodically, so it's impossible to say what you might get 3 months from now. You might want to call and ask them to make a note of youre dietary restrictions on your reservation, but I'm not sure if they can guarantee a special meal.

It's not uncommon to have a choice between some kind of meat and seafood (fish or shrimp), and sometimes pasta. Once you get closer to your flight, you can probably find out exactly what the menu will be and plan accordingly. If one of the options isn't acceptable, try and let the FA know before they take orders so they can reserve one for you.