Peel the sweet potato and cut it into small, uniform half-inch cubes to ensure even cooking.
Heat the avocado oil in a large cast-iron or non-stick skillet over medium-high heat.
Add the sweet potato cubes to the skillet and cook for 8-10 minutes, stirring occasionally, until they are tender and have developed a golden-brown crust.
Stir in the diced yellow onion and red bell pepper, sautéing for an additional 3-4 minutes until the vegetables are softened.
Push the vegetables to the outer edges of the pan and add the ground beef to the center, breaking it apart with a wooden spoon.
Sprinkle the sea salt, black pepper, garlic powder, and smoked paprika over the beef and vegetables.
Cook the beef for 5-6 minutes until fully browned and slightly crispy, then toss everything together to combine the flavors.
In a separate small non-stick skillet, fry the egg to your desired doneness, ideally leaving the yolk runny to act as a natural sauce.
Transfer the beef and sweet potato hash to a plate and top with the fried egg before serving.