How to Make It
In a small bowl, mix the harissa with the yogurt and lemon juice. In a large resealable plastic bag, toss the chicken leg quarters with the harissa marinade and let stand for 1 hour at room temperature.
Preheat the oven to 425°. In a 9-by-13-inch roasting pan, toss the chickpeas with the red onion and olive oil and season with salt and pepper. Roast in the oven for 15 minutes, until the onion begins to brown. Season the chicken with salt and pepper and set the legs skin side up on top of the chickpeas. Roast the chicken in the top third of the oven for 45 minutes, until the chicken is cooked through and the skin is browned. Transfer the chicken to plates, spoon the chickpeas and red onion alongside and serve.
Harissa is a fiery Tunisian spice paste. It is available in jars and tubes at many specialty food shops.