shironz

your quote of the mishna beruvah is correct

6 hours after meat, 1 hour or half an hour after dairy (depends on your tradition) is the actual time to wait

I serve tilapia or salmon for fish. they are healthy, filling, and delicious.

Think of erev yom kippur as a "cheat day" it is a mitzva to eat a lot bofore yom kippur, just as is is a mitzva to fast. For the sake of your healh, you should eat approximatly 1600 calories on erev yom kippur. As 1600 calories is a lot, you should not worry about portioning.