Preheat your oven to 400°F (200°C) and line a large baking sheet with parchment paper for easy cleanup.
Rinse and drain the chickpeas, then pat them very dry with a clean kitchen towel to ensure they get crispy.
Cut the chicken breast into 1-inch bite-sized cubes and thinly slice the red bell pepper.
In a large bowl, combine the chicken, chickpeas, and bell peppers; toss with olive oil, smoked paprika, garlic powder, sea salt, and black pepper until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 18-20 minutes, or until the chicken is cooked through and the chickpeas are golden.
While the tray roasts, place the chopped kale in a serving bowl with half of the lemon juice and massage with your hands for 1-2 minutes until the leaves are softened and dark green.
In a small jar or bowl, whisk together the remaining lemon juice and the tahini until smooth, adding a teaspoon of warm water if needed to reach a drizzling consistency.
Top the massaged kale with the warm roasted chicken, chickpeas, and peppers, then finish by drizzling the lemon-tahini sauce over the top.