Toss sweet potatoes, olive oil, cumin, smoked paprika and kosher salt together in a bowl.
Spread sweet potatoes in a single layer on a baking sheet and roast at 425° for 15 minutes, or until fork-tender.
While the potatoes roast, cook the kale in a skillet over medium heat in a bit of oil until it begins to wilt.
Add 6-8 Tbs. of water to the skillet and cover until kale is cooked through and wilted.
When the potatoes are done, toss them together with the kale and black beans.
Stir tomato sauce, garlic powder together.
Season to taste with salt.
Serve sweet potatoes, kale and black beans over rice, drizzled with tomato sauce.