Recipes and menu ideas: eggplant caponata, southern summer succotash, charred shishito peppers, summer squash gratin, peach glazed chicken thighs, roasted mackerel with garlic and paprika, and southwestern striped mullet. ~~~ Eggplant Caponata About a month ago, eggplants of all kinds and shapes appeared at the farmers market. When I first saw a display of them, …