It's funny how we eat the leaves of many brassica (mustard) plants - couve, cavolo nero, bok choy etc etc - and consider them finished once they start to flower. With broccoli, on the other hand, we wait for it to start flowering and eat that flowering head. What about all those leaves? A friend of ours said recently that broccoli leaves are his favourite of all the brassica leaves. "no way!" I thought.
I gave it a try last week and, sure enough, they're delicious! Notably, they hold their volume (don't shrink as much) and texture better than most other greens I've tried.
I chopped them up and cooked them in a pan with a little stock and the lid on. Delicious!
I would recommend trying this:
Chop the broccoli leaves and stems and add to a hot pan with olive oil. Toss for a minute, add some salt and little water (or stock), cover and cook on a low to medium heat. Once they're tender (check every couple of minutes) squeeze over some lemon juice and serve.
I think they could also be used in soups and stews. I'll be doing more research over winter. Maybe on cauliflower leaves too!