As eggplant joins the march of summer produce available at farmers tailgate markets, our thoughts are turning to Middle Eastern meze. You can easily fill several platters with a colorful combination of tomatoes, cucumbers, roasted squash and beets, babaganoush, hummus, tzatziki, eggs, olives, pickles, and pita for a feast. Or you could toss everything into a single pita for thoroughly satisfying sabich sandwich.