Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Dice the chicken breast into 1-inch cubes and chop the bell peppers and zucchini into similar bite-sized pieces.
Drain and rinse the chickpeas, then pat them thoroughly dry with a clean kitchen towel to ensure they get crispy.
Place the chicken, chickpeas, and vegetables onto the baking sheet.
Drizzle with olive oil and sprinkle evenly with sea salt, black pepper, smoked paprika, and garlic powder.
Toss everything together until well-coated, then spread into a single layer across the pan.
Roast for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden.
Remove from the oven, drizzle with fresh lemon juice, and serve immediately.