Preheat your oven to 400°F and line a large rimmed baking sheet with parchment paper.
Pat the chicken breast dry with paper towels and cut into uniform 1-inch cubes.
Rinse and drain the chickpeas, then pat them thoroughly dry to ensure they achieve a crispy texture when roasted.
Place the chicken cubes, dried chickpeas, broccoli florets, and sliced bell peppers onto the prepared baking sheet.
Drizzle the olive oil over the ingredients and sprinkle evenly with sea salt, black pepper, garlic powder, and smoked paprika.
Toss all ingredients together until well-coated in oil and spices, then spread them out into a single, even layer.
Roast in the oven for 20-25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden and crisp.
Remove from the oven, drizzle with fresh lemon juice, and garnish with chopped fresh parsley before serving.