You can add to it or eat is by itself. Here's a look at a typical ZoneFast day: http://www.zonediet.com/TypicalZone...fault.aspx
You don't need to count blocks when following the ZoneFast 1-2-3 program. The Grocery Additions page provides an excellent guide. If you follow it, you'll meet you daily needs within the Zone. You can find it here: http://www.zonediet.com/GroceryAddi...fault.aspx
To see how I've been doing it, you can read my ZoneFast Journal. I eat closer to the typical means amounts to support my increased protein needs. You can find it here: http://www.zonediet.com/Community/F...fault.aspx
Have fun with it!