Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
In a small mixing bowl, whisk together the harissa paste, extra virgin olive oil, and lemon juice until well combined.
Place the chicken breast, drained chickpeas, sliced bell peppers, sliced red onion, and sliced zucchini onto the prepared baking sheet.
Season the chicken and vegetables evenly with sea salt and black pepper.
Drizzle the harissa mixture over the ingredients and toss thoroughly with your hands or tongs to ensure everything is coated in the spice.
Spread the ingredients out into a single layer to ensure even roasting and maximum caramelization.
Roast for 22-25 minutes, or until the chicken is cooked through to an internal temperature of 165°F and the vegetables are tender.
Remove from the oven and garnish with freshly chopped parsley before serving.