Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Dice the chicken breast into bite-sized 1-inch cubes and pat them dry with a paper towel to ensure a good sear.
In a large mixing bowl, combine the chicken cubes, chickpeas, and broccoli florets with olive oil, garlic powder, sea salt, and black pepper, tossing until evenly coated.
Spread the mixture in a single layer on the prepared baking sheet and roast for 20 minutes until the chicken is cooked through and the chickpeas are golden and crispy.
While the tray roasts, place the chopped kale in a bowl and massage it with half of the lemon juice for one minute until the leaves become tender and bright green.
In a small ramekin, whisk together the Greek yogurt and the remaining lemon juice to create a smooth, pourable dressing.
Assemble the bowl by layering the massaged kale at the bottom, topping with the roasted chicken and veggie mix, crumbling the feta cheese over the top, and finishing with a generous drizzle of the lemon-yogurt sauce.