I'm going go link to two great threads you should read if you haven't already:
What's your P2 Combo and
Phase 2 Emergency Handbook. There is lots of information there.
I think for most of us it is really trial and error and finding out what works for us personally; everyone is different in how they respond when adding back foods. IMO it is better to err on the side of going slow. And if that goes well you can add more and add faster. Also, the time of day you eat certain foods may impact you as well.