Grilled Lamb and Potato Kebabs

Name: Grilled Lamb and Potato Kebabs
Ingredients: 1/2 cup mayonnaise; 2 tablespoons fresh lemon juice; 1/2 teaspoon dried oregano; 1 medium garlic clove, grated (about 1/2 teaspoon); 2 ounces feta cheese, crumbled (about 1/2 cup); 2 tablespoons drained minced pitted kalamata olives; 16 baby yellow potatoes (about 12 ounces); 1/4 teaspoon black pepper; 2 1/2 tablespoons extra-virgin olive oil, divided, plus more for grilling; 1 teaspoon kosher salt, divided; 16 dried apricot halves; 1 pound boneless leg of lamb or loin, cut into 32 (1-inch) pieces; 1 tablespoon za’atar; 2 teaspoons grated lemon zest