Stir fry? coleslaw? who cares?

During the summer months if I have time at the weekends, I will chop up a cabbage, a few carrots and an onion (this might be whilst I am preparing Sunday lunch and busy chopping up vegetables in general).  I then pop them in a plastic bag and shake them well.
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I then use this to make some coleslaw during the week which is great with a jacket potato, or can be used to  make a stir fry with a few noodles or some rice.

This creates two meals from one and is cheap and easy to make.