Marinated Picholine Olives

Name: Marinated Picholine Olives
Ingredients: 2 large garlic cloves, thinly sliced lengthwise; 1/2 cup plus 2 tablespoons olive oil; 1/2 cup white-wine vinegar; 1 large shallot, thinly sliced lengthwise; 1 tablespoon packed dark brown sugar; 1/4 teaspoon whole allspice, lightly crushed with flat side of a large heavy knife; 1 teaspoon whole pink peppercorns, lightly crushed; 1 (3-inch) cinnamon stick; 2 Turkish bay leaves or 1 California; 2 (3- by 1-inch) strips fresh lemon zest; 2 (4- by 1-inch) strips fresh orange zest; 2 cups whole picholine or other brine-cured small green olives (3/4 pounds)