Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Peel the sweet potato and cut it into uniform 1/2-inch cubes to ensure even roasting.
Place the sweet potato cubes on the baking sheet, drizzle with half of the olive oil, and sprinkle with a pinch of sea salt and black pepper.
Roast the sweet potatoes for 20-25 minutes, tossing halfway through, until the edges are golden brown and 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 into small pieces with a wooden spoon, and cook until it is fully browned and no pink remains.
Stir in the diced red and green bell peppers, garlic powder, and onion powder, then sauté for 4-5 minutes until the peppers are tender-crisp.
Remove the skillet from the heat and gently fold in the roasted sweet potato cubes.
Season the entire mixture with the remaining sea salt and black pepper to taste.
Divide the mixture into bowls and garnish with freshly chopped parsley before serving.