Ingredients

1 whole chicken (about 3 1/2 pounds), patted dry

3 tablespoons extra-virgin olive oil

Kosher salt and freshly ground pepper

1/2 small red onion, very thinly sliced (1/2 cup)

2 tablespoons white-wine vinegar

1 1/2 cups Greek yogurt

1 Persian cucumber, grated on large holes of a box grater (1/2 cup)

1 tablespoon fresh lemon juice, plus 1 lemon, thinly sliced

2 cans (each 15.5 ounces) chickpeas, rinsed and well drained

2 packed cups fresh herbs, such as parsley, cilantro, and mint

Preparation

Preheat oven to 475 degrees. Cut chicken along backbone on one side with shears; open like a book. Turn over; press flat on a rimmed baking sheet. Rub with 1 tablespoon oil; season with salt and pepper. Roast 25 minutes. Meanwhile, combine onion and vinegar in a large bowl. In another bowl, combine yogurt, cucumber, and lemon juice. Season both with salt and pepper.

Remove sheet from oven; scatter chickpeas and lemon slices around chicken. Season with salt and pepper. Drizzle with remaining oil. Roast until a thermometer inserted into thickest part ofbreast registers 165 degrees, about 15 minutes. Transfer chicken to a cutting board. Return sheet to oven; roast until chickpeas are crisp, 10 minutes. Cut chicken into pieces. Toss chickpea mixture and herbs with onion mixture. Serve, with chicken and yogurt sauce.