Pan-Roasted Chicken with Za'atar, Potatoes, and Greens

Name: Pan-Roasted Chicken with Za'atar, Potatoes, and Greens
Prep time: 25 min
Total time: 25 min
Cuisine: Asian, Middle Eastern
Ingredients: 4 teaspoons za'atar; 0.25 cup extra-virgin olive oil, plus more for drizzling; Kosher salt and freshly ground pepper; 3 pounds bone-in, skin-on chicken thighs and drumsticks; 1 pound fingerling potatoes, cut in half lengthwise; 1 medium red onion, peeled, halved lengthwise, and cut into ½-inch wedges; 1 lemon, cut in half; 1 bunch (8 ounces) lacinato kale, ribs removed, torn into 2-inch pieces (about 4 packed cups)