Julia Child said "It's hard to imagine civilization without onions." I have to agree with her, but I might add a couple words to that sentence. For me, it's hard to imagine civilization without onions and vinegar.
What to do with all that zucchini? Sub it for cucumbers for easy refrigerator pickles! After a few days marinating in the frig, these are colored nicely, packed with flavor, and crisp. Even zucchini haters will like them. Easy, no-canning method.