Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Drain and rinse the chickpeas, then pat them thoroughly dry with a clean kitchen towel to ensure maximum crispiness.
Dice the chicken breast into uniform one-inch cubes and chop the bell pepper into similar sized pieces.
Place the chicken, chickpeas, broccoli florets, and bell peppers onto the baking sheet.
Drizzle the olive oil over the ingredients and sprinkle with sea salt, black pepper, garlic powder, and dried oregano.
Toss everything together until evenly coated, then spread into a single layer.
Roast in the oven for 20 to 25 minutes, tossing halfway through, until the chicken is cooked through and the chickpeas are golden.
Remove from the oven and drizzle the fresh lemon juice over the hot roasted mixture before serving in a bowl.