Over here in the UK we call it ‘purple sprouting’ or purple sprouting broccoli. It is generally more expensive than the green stuff and can taste much better too… Certainly it should be safe to eat, maybe steamed with a little butter and black pepper – eat like asparagus. Hm, now I am peckish! I hope you enjoy.
Oh yes, of course you can eat it, here by us a lot of people like to buy it and it tastes just like normal broccoli. Nothing wrong with it and won’t kill you at all lol