Preheat oven to 400°F and line a large baking sheet with parchment paper.
Cut the chicken breast into 1-inch bite-sized cubes and pat dry with a paper towel.
Rinse and drain the chickpeas, then pat them thoroughly dry with a towel to ensure crispiness.
Chop the broccoli into small florets and dice the red bell pepper into 1-inch pieces.
In a large mixing bowl, combine the chicken cubes, chickpeas, broccoli, and bell pepper.
Drizzle with olive oil and sprinkle with sea salt, black pepper, garlic powder, and smoked paprika.
Toss everything together until the ingredients are evenly coated with the oil and spices.
Spread the mixture in a single layer on the prepared baking sheet, ensuring nothing is overcrowded.
Roast for 20-25 minutes, tossing halfway through, until the chicken is cooked through and chickpeas are golden.
Remove from the oven and drizzle with fresh lemon juice before serving warm.