I have done this too, but I also wrapped several layers of plastic wrap and placed it in a zip lock bag to insure no freezer burn, in case I didn't get it used up in a timely manner. Now I use a vacuum sealer works much better, no freezer burn because all the air has been 'sucked' out.
Cut it in sticks or in slices, wash it and freeze it. Make sure it is very dry before freezing so ice crystals don't form on it, which causes it to deteriorate faster. Also, try and remove as much air out of the container because air also does the same. Peppers and onions can also be frozen in this manner, without blanching.
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Freezing Vegetables