Packaged Foods not always Convenient

I recently bought a package of pre-cut kale because the bunches were not available.

I should have remembered from previous experience that these bags tend to be full of stems.  What you see here is half a bag of kale that I had already blanched (boiled for just a minute or two).  I let it cool before I removed the stems.  That's what I get for being in a hurry:

I hope I don't forget this lesson again!

Have you ever found a "convenience food" that was not so convenient?