Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Cut the chicken breast into bite-sized pieces and cube the sweet potato into half-inch chunks.
In a mixing bowl, toss the chicken and sweet potatoes with olive oil, sea salt, black pepper, garlic powder, and smoked paprika until evenly coated.
Spread the mixture onto the prepared baking sheet in a single layer and roast for 20-25 minutes until the chicken is cooked through and potatoes are golden brown.
While the oven does the work, place the chopped kale in a large bowl and massage it with half of the lemon juice for 2 minutes until the leaves become tender and dark green.
In a small ramekin, whisk together the tahini and the remaining lemon juice, adding a teaspoon of warm water at a time until it reaches a smooth, pourable consistency.
Assemble the bowl by placing the massaged kale at the base, topping with the warm roasted chicken and sweet potatoes, and drizzling the creamy tahini dressing over the top.