While they obviously have similar menus, each meal, ship, and itinerary is going to be different. Often they'll cater the menu to the area being cruised or based on the majority of nationalities on the cruise.
What specifically are you wondering about? I'm sure there's enough Princess cruisers on here they will be happy to answer any questions you might have.
But if you want to just look at a sample menu, I agree with trackypup in that you can just google it to see what you can find.
Travel Agent/Cruise Specialist w/13 yrs exp and 48 Cruises on 11 cruise lines! Favorites: Paul Gauguin - Tahiti: Uniworld River Cruises - Europe; Celebrity Solstice-class ships; Holland America - 12-nights Baltics & Russia; RCCL - 14-nights Greek Isles, Turkey, & Croatia; Holland America - 14-day Alaskan cruisetour; 10-night Canada/New England cruise; 21 days Hawaii w/7-night NCL cruise; Oceania - 25 days in Asia; more than 3 months touring Europe by train. And many all-inclusive resorts!