Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Drain and rinse the chickpeas, then pat them very dry with a clean kitchen towel to ensure they roast up crispy.
Cut the chicken breast into bite-sized cubes and place them on the baking sheet along with the dried chickpeas.
Drizzle the chicken and chickpeas with olive oil, then sprinkle with smoked paprika, garlic powder, sea salt, and black pepper.
Toss everything directly on the pan until the chicken and chickpeas are evenly coated in the oil and spices.
Roast for 10 minutes, then remove the pan and add the chopped bell peppers, tossing them into the mix.
Return the pan to the oven for another 10 to 12 minutes, or until the chicken is cooked through and the chickpeas are golden.
Place the fresh spinach in a large serving bowl and top it with the warm roasted chicken, chickpea, and pepper mixture.
Finish the bowl by sprinkling with crumbled feta cheese and a bright squeeze of fresh lemon juice.