A quick and easy weeknight dinner of za'atar-spiced chicken kebabs, with soft pita bread, crunchy cucumbers flecked with mint, and a fast garlick-y yogurt sauce.
Sprinkle garlic with salt; mash into a paste with the side of a knife. Stir into yogurt; season with salt and pepper.
Preheat broiler, with rack in upper position. On a rimmed baking sheet, drizzle chicken, bell pepper, and onion with 2 tablespoons oil. Sprinkle with 2 teaspoons za'atar; season with salt and pepper. Toss to combine. Thread chicken and vegetables onto 6 skewers. Arrange in a single layer on sheet; broil until lightly charred, 6 minutes.
Flip; broil until chicken is cooked, 2 to 3 minutes. Broil pitas on a baking sheet until lightly charred, 1 minute. Drizzle with oil, sprinkle with za'atar, and season with salt. Remove chicken and vegetables from skewers; serve with cucumbers, mint, pitas, and yogurt sauce.