Preheat your oven to 400°F (200°C) and line a large rimmed baking sheet with parchment paper for easy cleanup.
Scrub the sweet potato and dice into uniform 1/2-inch cubes; rinse and thoroughly pat the chickpeas dry with a paper towel to ensure they get crispy.
Arrange the chicken breast, sweet potato cubes, and chickpeas on the prepared baking sheet in a single layer.
Drizzle everything with the olive oil and evenly sprinkle with the sea salt, black pepper, smoked paprika, and garlic powder.
Roast for 20-25 minutes, or until the chicken reaches an internal temperature of 165°F and the potatoes are fork-tender.
While the tray roasts, place the kale in a large bowl with the lemon juice, massaging the leaves with your hands for 1-2 minutes until they become tender and vibrant.
Slice the rested chicken into strips and assemble the bowl by layering the massaged kale, roasted sweet potatoes, and crispy chickpeas.