I’ve been on 35+ cruises on Princess so here’s what I know.
There is always the main dinning room, usually on deck 6 opened, from 12 noon to 1:30 pm. It’s always my 1st choice to have a relaxing meal with a beverage. There is also food on the pool deck, hamburgers etc & a pizza restaurant.
On deck 7 there is Alfredo's Pizzeria & the Ocean Terrace Sushi both an excellent choice for a sit down meal.
Hope than this helps.
Tom😀