That's great that your broccoli grew so well. I enjoy eating the stems if they are healthy. I also like to eat the leaves if they are tender enough. There's a lot of food from a broccoli plant - and all very healthy. I believe there will be side shoots that also grow for a second harvest, after the main head is cut.
You are very fortunate.
Thanks, yes much can be eaten I also eat it all, sweet potato or kumara is another good one, leaves roots and stems can be eaten, one i learnt about recently but quite common is the leaves off the grape vine.