If you’re growing this yummy veg in your garden, then don’t panic if it looks like it’s only growing one lonely little broccoli spear!
The way broccoli grows is to form a broccoli head at the top of the plant, and then to grow a series of broccoli spears from sideshoots. So, to harvest it, use a pair of secateurs or a sharp knife to cut off the first broccoli head that appears. Do this while the broccoli is still quite firm, before it opens into flower.
The plant will then start to produce lots of sideshoots. As they reach a harvestable size in the following days, cut them off, including about 10cm of stalk. Again, make sure you harvest them before they flower to keep the plant productive (you can always store them in the fridge for a few days if you don’t want to eat them immediately). You should get a good harvest for a few weeks.