Just when I was about to get overwhelmed by far too many fresh veggies wending their way through my kitchen, I remembered the Batch cookbook. This easy Roasted Grape Onion Chutney soothed my nerves. With zucchini, eggplant, swiss chard, butternut squash, radicchio, carrots and sweet corn still oozing out of the fridge, I found a new use for onions…