But you can basically eat all of the steak you want... The diet (more of a lifestyle) has too much upside to avoid it just to eat pasta and drink beer (also forbidden).
Worth a few minutes of research and some youtube videos. I suggest Nina Tiecholz, Gary Taubes, Gary Fettke, Tim Noakes, and Duke professor/practitioner Eric Westman.
https://www.youtube.com/watch?v=xMVI_t6Vfqo&t=32s