Dice the chicken breast into small, even cubes and set aside.
Peel and dice the sweet potato into half-inch cubes to ensure even cooking.
Heat the olive oil in a large skillet over medium-high heat until shimmering.
Add the chicken cubes to the skillet and sauté until golden brown and cooked through, then remove and set aside on a plate.
In the same skillet, add the diced sweet potatoes and onions, sautéing for 8-10 minutes until the potatoes are tender and slightly caramelized.
Stir in the minced garlic, sea salt, black pepper, and smoked paprika, cooking for 1 minute until fragrant.
Add the chopped kale and return the cooked chicken to the skillet.
Toss everything together for 2 minutes until the kale is wilted and the chicken is reheated.
Serve immediately while the potatoes are crisp and hot.