I used to grow it commercially as Baby Leaf Spinach. Trick is to keep it growing quickly.
Now would be the ideal time to sow, with plenty more rain and mild temperatures for the rest of the month. At this time of year you should be looking at about 4 weeks sowing to harvest.
If it stays mild and wet, you may be lucky to get re-growth from the stubble and get a 2nd crop.
Hope this helps!