Crisp summer veggies are one of our favorite warm-weather perks, but plain old salads and steamy green sides can get a little boring. Chew on this: restaurants across the city are taking a culinary cue from their grandmothers and serving up piles of house-pickled veggies by the Mason jarful. But naturally, given diners’ proclivity for taste and texture, these ain’t an old lady’s flaccid green beans. Picture tart and crunchy summer squashes, zucchini, mushrooms, carrots, onions, and beets, all with the refreshing pucker synonymous with summer meals. You’ll find these treats at the Beehive (541 Tremont Street, Boston, 617.423.0069), T.W. Food (377 Walden Street, Cambridge, 617.864.4745), and the Butcher Shop (552 Tremont Street, Boston, 617.423.4800), among others. Enjoy them with relish.