Preheat your oven to 425°F and line a large sheet pan with parchment paper for easy cleanup. Pat the chicken pieces dry with paper towels, which helps the harissa marinade adhere properly and promotes golden browning.
Whisk together harissa paste, olive oil, honey, minced garlic, cumin, paprika, lemon juice, salt, and black pepper in a small bowl. This fragrant mixture will coat your chicken and create incredible depth of flavor throughout the roasting process.
Toss the chicken pieces in the harissa marinade until completely covered, then arrange them on the prepared sheet pan. Scatter the zucchini, cherry tomatoes, bell pepper, and red onion around the chicken, ensuring even spacing so everything roasts uniformly.
Drizzle the vegetables with any remaining marinade and the pan's accumulated juices, then roast for 30-35 minutes until chicken reaches an internal temperature of 165°F. Sheet pan harissa chicken family summer recipe achieves perfectly caramelized edges while vegetables turn tender and slightly charred at the edges.
Remove the pan from the oven and let it rest for 5 minutes before serving, allowing juices to redistribute through the meat. Sprinkle fresh cilantro over top, dollop Greek yogurt on individual portions, and serve immediately while still steaming.