Marinated Feta with Lemony Herb “Jam” Balls

Name: Marinated Feta with Lemony Herb “Jam” Balls
Ingredients: 1/4 cup dried currants; 6 lemon peel strips, plus 1/4 cup fresh lemon juice (from 1 lemon), divided; 1 pound coarsely chopped Swiss chard leaves (about 16 packed cups), stems discarded (from 3 bunches); 2 cups packed fresh cilantro leaves and tender stems; 2 cups packed fresh mint leaves; 2 cups packed fresh flat-leaf parsley leaves and tender stems; 3 1/4 cups mild extra-virgin olive oil, divided; 1 teaspoon ground coriander; 1 teaspoon Aleppo pepper; 2 tablespoons fresh thyme leaves, chopped; 2 teaspoons kosher salt; 2 teaspoons finely chopped preserved lemon; 12 ounces feta cheese, cut into 24 (1-inch) cubes; 6 garlic cloves, smashed; 6 thyme sprigs; Crostini or crackers, for serving