Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper.
Rinse the canned chickpeas thoroughly and pat them very dry with a clean kitchen towel or paper towels to ensure maximum crunch.
Dice the chicken breast into small, bite-sized pieces roughly the same size as the chickpeas.
In a large mixing bowl, combine the dried chickpeas and chicken pieces with the olive oil, sea salt, smoked paprika, garlic powder, onion powder, and black pepper.
Toss the mixture until everything is evenly coated in the oil and spice blend.
Spread the mixture in a single layer on the prepared baking sheet, ensuring there is space between the pieces for air circulation.
Roast in the oven for 20 to 25 minutes, shaking the pan halfway through, until the chicken is cooked through and the chickpeas are golden and crunchy.
Place the fresh baby spinach in a serving bowl and top with the warm roasted chickpea and chicken mixture.