This may confuse further since Ted Naiman is one of the higher protein guys, but he puts food graphics next to his P:E ratio. Something like his memes help?
http://burnfatnotsugar.com/ProteinEnergy.html.

Since Dr Westman keeps the program so simple, and believes in humans innate ability to get the amount of protein they need, I did nothing more than:
Goal to Eat 14oz (my target amount at 1.5kg per K LBM), eat whatever I like, say 2 eggs, 6oz can salmon for lunch, 6 Oz beef for dinner = 14 Oz protein. If I went over or under, and I went over often in the first couple of years, no worries, still in a pretty wide range.