Make deep slits over the chicken pieces. Blend together the cornstarch, yogurt, harissa, mint, cumin, and salt and pepper. Spread the mixture over both sides of the chicken.
If you can - marinate in the refrigerator for 2-24 hours.
Bake for 35-45 minutes in a 400 degree oven.
Serve warm or cold with a green salad and a squeeze of lemon.
Notes
Can use a mix of thighs and legs.Marinade can be use on whole roasted chickens also.Use a milder harissa paste if you want less heat.Can omit the mint if it's not in season.