Ingredients

• 3 tablespoons extra-virgin olive oil, divided
• ⅓ cup chopped marinated artichoke hearts
• ⅓ cup chopped salami
• ¼ cup chopped pepperoncini
• 2 tablespoons red-wine vinegar
• 1 tablespoon chopped fresh oregano, plus more for garnish
• 1 pound chicken cutlets
• ½ teaspoon ground pepper
• 2 ounces fresh mozzarella cheese, thinly sliced