Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper.
Drain and rinse the chickpeas, then pat them very dry with a clean kitchen towel to ensure they crisp up properly.
Cut the chicken breast into small, uniform 1-inch cubes for even roasting.
In a medium bowl, combine the chickpeas and chicken cubes with olive oil, chili powder, sea salt, and black pepper.
Spread the mixture in a single layer on the prepared baking sheet, ensuring there is space between the pieces.
Roast for 20 to 25 minutes, shaking the pan halfway through, until the chicken is cooked through and the chickpeas are golden and crunchy.
Remove from the oven and immediately drizzle with fresh lime juice while the ingredients are still hot.
Place the fresh baby spinach in a bowl and top with the warm roasted chicken and chickpea mixture.