Heat a skillet over medium heat and add the spices, stirring until the spices are toasted and fragrant.
Pour the toasted spices into a bowl, and stir in the yogurt, minced garlic, chopped onion, and olive oil. Add the chicken, turning to make sure the chicken is completely coated. Cover with plastic wrap and let it marinate in the fridge for about an hour (or even up to overnight, if it's convenient)
Cover a baking sheet with aluminum foil and give it a spritz with nonstick spray
Preheat the oven broiler on high heat, and broil the chicken for about 15 minutes, flipping it once at the 7-minute mark. You'll know the chicken is done cooking when a thermometer registers an internal temperature of 165 °F