This recipe was actually the result of a happy accident. I wanted to make my favorite standard chicken salad — mayo, celery, walnuts — but when I got home after a long day I realized I was out of mayo... and walnuts. And I really, really didn't want to go back out to the store (you know what that's like). So I improvised with what I did have on-hand: balsamic vinegar and arugula. The result? A Delicious, simple, and oh-so easy sandwich.
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