Heptagon
Such a weirdo configuration, its annoyingly resistant to me trying to integrate it
Edit - heres how it came out:
Not bad but still annoyingly uneven
Wheres a damn "kitchen" protractor when you need it?!
Cut a Y shape, estimating the 1/7 as best you can, then cut the wider two parts each into equal 3rds. Even if you were off with the first slice, the hungriest or fullest person can have that one and it will still look symmetrical.