Preheat your oven to 400°F (200°C) and line a small baking dish with parchment paper.
Dice the russet potato into small, uniform half-inch cubes to ensure even cooking and maximum crispiness.
In a medium bowl, toss the potato cubes with the olive oil, half of the garlic powder, smoked paprika, sea salt, and black pepper.
Spread the seasoned potatoes in the baking dish and roast for 20-25 minutes until they are golden brown and tender.
While the potatoes roast, heat a non-stick skillet over medium-high heat and add the ground beef, diced onion, and red bell pepper.
Cook the beef mixture, breaking it up with a spatula, until the meat is thoroughly browned and the vegetables have softened.
Season the beef mixture with the remaining garlic powder and an extra pinch of salt and pepper if desired.
Once the potatoes are ready, remove the dish from the oven and stir the beef and vegetable mixture directly into the potatoes.
Sprinkle the shredded sharp cheddar cheese evenly over the top of the beef and potato mixture.
Return the dish to the oven for 3-5 minutes, or until the cheese is completely melted and bubbling, then serve immediately.