I hope you believe me when I tell you that this really is as brainlessly easy as it looks. Just put the stump in a shallow dish of water and walk away.
Now imagine if you did this everything you cut sawi. Or cabbage. Or chinese cabbage. Or celery. Or honestly, any kind of vegetable with this kind of bottom. Now imagine if everyone did this.
That is exactly the kind of world that I want to create and live in.
It is almost about time to stick this into the ground and let it grow into an adult sawi. If nothing else appeals to you about this kitchen waste-eliminating move, then think about harvesting your own sawi. Free sawi, yo! And now stick that free sawi in a dish of water. Voila! Another free sawi! This goes on for like evah.