Preheat your oven to 400°F and line a large baking sheet with parchment paper.
Toss the cubed sweet potatoes with half of the olive oil and a pinch of sea salt, then spread them in a single layer on the baking sheet.
Roast the sweet potatoes for 20-25 minutes, flipping halfway through, until they are tender and slightly caramelized.
While the potatoes roast, heat the remaining olive oil in a large skillet over medium-high heat.
Add the ground beef to the skillet, breaking it apart with a wooden spoon, and cook until it is fully browned and no longer pink.
Stir in the diced red bell pepper, garlic powder, onion powder, smoked paprika, sea salt, and black pepper, and cook for an additional 3-4 minutes.
Add the chopped kale to the skillet and sauté for 2 minutes until the leaves are wilted and bright green.
Remove the skillet from the heat and stir in the roasted sweet potatoes before serving warm in a large bowl.