Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized cubes and drain and rinse the chickpeas, patting them very dry with a towel to ensure they get crispy.
Place the chicken, chickpeas, broccoli florets, and sliced bell peppers onto the baking sheet.
Drizzle with extra virgin olive oil and sprinkle evenly with sea salt, black pepper, garlic powder, and smoked paprika.
Toss everything together until well-coated, then spread into a single layer to ensure even roasting.
Roast in the oven for 20-25 minutes, or until the chicken is cooked through and the vegetables are tender-crisp with charred edges.
While roasting, whisk together the lemon juice and tahini in a small bowl until smooth.
Transfer the roasted mixture to a bowl and drizzle with the lemon-tahini dressing before serving.