Preheat oven to 425°F (220°C).
Toss cubed sweet potatoes with oil, salt, and pepper in a bowl.
Spread sweet potatoes on a baking sheet and roast for 25-30 minutes until tender and slightly caramelized.
While potatoes roast, massage chopped kale with a pinch of salt until leaves soften.
Whisk together all dressing ingredients in a small bowl until smooth.
In a large bowl, combine massaged kale with cherry tomatoes and pomegranate seeds.
Add chickpeas if using.
Divide mixture into serving bowls and top with roasted sweet potatoes.
Drizzle with lemon-tahini dressing and serve immediately.