I generally buy produce as I need it, but every so often the price on bagged potatoes or onions or whatever is soooo good that I buy the bagged stuff. And 90% of the time, I end up with a bagful of sprouted vegetables.
Sprouted potatoes are no big deal; just cut the sprouts off and cook the taters (the sprouts and any green bits are mildly poisonous and not good for you but any parts that still look like a regular potato are fine to eat). Sprouted onions, on the other hand, are smushy and moldy and gross and I usually compost the whole bag and have a quiet rant against Big Onion (see? Mad at everything).
But you can actually salvage a lot out of a bag of sprouted onions if you have a half hour or so to kill (if, on the other hand, you decide that your time is worth more than the buck-fifty you spent on the onions, I will not blame you).
Here is the pile of onions that I mostly already processed before it occurred to me to take some pictures:
![20180309_1238471227986798.jpg](https://foodclothingshelterblog.wordpress.com/wp-content/uploads/2018/03/20180309_1238471227986798.jpg?w=573&h=322)
To clean the sprout to its center, cut a slit vertically not quite halfway through the onion, as per the photo above. Peel off all the grossness. The grossness may be stinky, slimy, and/or moldy. Do not falter. Compost the grossness, or throw it out.
Most of the onions in this bag had two sprouts in the center:
![20180309_124522663530471.jpg](https://foodclothingshelterblog.wordpress.com/wp-content/uploads/2018/03/20180309_124522663530471.jpg?w=570&h=294)
You can try to break them apart but I usually end up breaking one off the root entirely, so I recommend gently separating them and cutting the root between them with a knife. Do separate them; they won’t grow well if you don’t and getting two onions from one is the most satisfying part of this whole endeavor.
Once you’ve got your onion centers with the root end still attached, you want to put them in some water until they’ve grown white roots about an inch long. Unless you got every little bit of yuckiness off the root area, it’s best to try to keep them just lightly damp because if they’re too wet they’ll get gross again and STINK. The easiest solution would probably be to trim the tops so that they’re all basically straight (leave at least 2 inches or so of green), tie them into a bunch so the root ends are all level-ish, and set them in a glass or a dish or something with stones and enough water to just touch the root ends.
I didn’t do that.
Instead, I took a 1-liter and a 2-liter soda bottle, cut the bottom off the 1-liter and the top off the 2-liter. I took a paper towel, folded and rolled it into a “wick” about two inches long and jammed it into the spout of the 1-liter bottle so that most of the paper is inside the bottle. I then arranged the onions around the wick so that each one is touching it.
Then I set it in the bottom of the 2-liter bottle [every time I try to type ‘bottle’ I must first type ‘bootle’. I don’t know what that means about me] and added water. Make sure the water level stays below the root ends of the onions and you should be in good shape. Or you could just do the first thing I said, which is probably easier. The wick technique is nice because the water-level is a lot more forgiving, but it’s also sort of ridiculous.
Keep an close eye on the whole shebang — the longer they stay in water the more likely it is any residual yuckiness will metastasize all over your new roots, paper towel, etc. If you see the root area getting brownish, mucky, or starting to smell bad, take the onions out, gently clean the root ends, wash or replace your containers and put it all back together.
You can continue to use the tops as green onions — trimming won’t hurt them. Once they’ve developed nice roots and it’s spring-y outside, plant them in some dirt or dirt-analog (bury the white bits, leave the green bits showing) and put them outside. Sun, water, all the standard stuff, harvest when the tops start to wither and die, and Bobsyeruncle with just a little effort and 6-7 months of waiting you totally didn’t waste that bag of onions!
(If you find yourself with sprouted onions and it’s not getting on to spring, you can keep them in water for quite a while, but do remember about keeping them clean. You can also try to plant them in pots and grow them indoors, but I suspect the results would be disappointing.)