Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Dice the chicken breast into bite-sized pieces and slice the red bell pepper into thin strips.
Rinse and thoroughly pat the chickpeas dry with a paper towel to ensure they get crispy.
In a large bowl, combine the chicken, chickpeas, broccoli, and peppers.
Drizzle with olive oil and sprinkle with ground cumin, smoked paprika, sea salt, and black pepper, tossing until everything is evenly coated.
Spread the mixture in a single layer on the prepared baking sheet.
Roast for 20 to 25 minutes, or until the chicken is cooked through and the chickpeas are slightly golden.
In a small ramekin, whisk together the lemon juice and tahini until smooth.
Transfer the roasted mixture to a bowl and drizzle the lemon-tahini sauce over the top before serving.