Preheat your oven to 400°F and line a small baking dish with parchment paper.
Peel and dice the russet potato into 1/2-inch cubes for even cooking.
In a medium bowl, toss the potato cubes with olive oil and half of the sea salt, black pepper, garlic powder, and smoked paprika.
Spread the potatoes in the baking dish and roast for 20 minutes until they are tender and golden.
While potatoes roast, sauté the ground beef, yellow onion, and red bell pepper in a skillet over medium-high heat until the beef is fully browned, then season with the remaining spices.
Drain any excess fat from the skillet, then stir the roasted potatoes into the beef and vegetable mixture.
Transfer the mixture back to the baking dish, sprinkle with shredded sharp cheddar cheese, and bake for 5 minutes until the cheese is melted and bubbly.