Grilled Eggplant, Halloumi, And Pesto Burgers

Ingredients

• 1 medium eggplant, cut into ½-inch thick rounds
• 3/4 tablespoon olive oil
• 3/4 tablespoon balsamic vinegar
• 1/4 teaspoon dry italian seasoning
• kosher salt
• freshly ground black pepper
• 4 ounce halloumi cheese
• 4 burger buns
• 4 teaspoon pesto
• mayonnaise (optional)
• 2 lettuce leaves, cut in half
• 1 large tomato, cut into 4 slices