There’s really not much around the airport other than a mess of highways. You’ll need to Uber to Newark Penn station or rent a car. If you’ll be in Oradell, I would look for places in Bergen county and NYC. Terminal A in the airport is brand new and actually has a lot of food options if you need to kill time there.

For food places in Newark itself I have enjoyed Mercato pie and hobby’s deli. I just work in Newark though so I’ll leave it to others to mention their fave spots.