Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel the sweet potato and dice it into uniform half-inch cubes to ensure even cooking.
Place the sweet potato cubes on the baking sheet and toss with olive oil, sea salt, and smoked paprika.
Roast the potatoes for 20-25 minutes, flipping halfway through, until the edges are golden and the centers are tender.
While the potatoes roast, place a large skillet over medium-high heat and brown the ground beef until no pink remains.
Add the diced red onion and bell peppers to the skillet with the beef, sautéing for 5-7 minutes until the vegetables are softened.
Stir in the garlic powder and black pepper, adjusting the heat to medium to prevent scorching.
Gently fold the roasted sweet potatoes into the beef and vegetable mixture, garnish with chopped fresh parsley, and serve immediately.