Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Cut the chicken breast into uniform 1-inch bite-sized pieces and chop the red bell pepper into similar sizes.
In a large mixing bowl, combine the chicken, rinsed chickpeas, broccoli florets, and chopped bell pepper.
Add the olive oil, lemon juice, minced garlic, sea salt, black pepper, and dried oregano to the bowl.
Toss all ingredients together until the chicken and vegetables are evenly coated with the oil and seasonings.
Spread the mixture in a single layer on the prepared baking sheet, ensuring enough space for the vegetables to roast rather than steam.
Roast in the center of the oven for 18 to 22 minutes, or until the chicken is cooked through and the broccoli edges are slightly charred and golden.
Remove from the oven and serve immediately, optionally garnishing with fresh parsley or an extra squeeze of lemon.