Hiya! Congrats on beginning the MC!
Since you plan on doing the flush, if you can, get some malic acid or herbs to crush the stones before you do the flush for best results. Or drink one glass of applejuice a day - it won't interfere iwth the Master-Cleanse
too much. If you can't, oh well, the flush will still go okay. :)
After the flush/MC, what you want to do is only eat things that are very easy to digest, as your digestive system will be asleep and needs to be awakened slowly.
Everyone is different, but what I find easiest are simple soups (I don't do well with cold things) and whole-grain hot cereals, the kind that are crushed down into a powder. I do okay with whole oats, though. My local health food store has some excellent breakfast cereals like Lundburgh's brown rice, almond flavor. Yum! Basically, you want to eat what they'd give to a very very old person. ;) I drink herbal tea, usually a de-tox, chamomile, peppermint, or Yogi tea that has some nice spices like cinnamon to really wake up the stomach.
Hope that helps!