AA is varying their menus a bit more these days. For many years it was:
Beef steak (with unsurprising side dishes)
Mildly spiced chicken (with other unsurprising side dishes)
White fish (haddock, cod, tilapia) with extra boring side dishes
Pasta in tomato or cream sauce
So now you've still got the beef, chicken, fish, and vegetarian options but they're more varied these days.
I tend to find that AA food is usually fairly tasty, if not very exciting, and does the job well. The crews can usually cook it OK too, unlike some airlines that deliver very variable cooking quality.
I wouldn't worry too much, though you won't get some very inventive modern cuisine. However then you won't get some very
inventive modern cuisine that makes you wonder what is this crap and how do I eat it? - with no alternatives in the metal can in the sky