Greek Inspired Burgers

Bahan-bahan (6 porsi)

• 3 tablespoons white wine vinegar
• ½ teaspoon dried oregano
• ½ teaspoon salt
• ¼ teaspoon freshly ground black pepper
• ¼ cup extra virgin olive oil
• 1 large eggplant, (sliced into rounds, ½-inch thick)
• 2 pounds ground lamb
• ¾ cup chopped fresh mint leaves
• 1½ tablespoons ground cumin
• salt and freshly ground black pepper, (to taste)
• vegetable oil
• 6 small pita breads, (halved horizontally)
• 3 cups chopped romaine lettuce
• 1½ cups tzatziki sauce ((store-bought or homemade))