Wash and dice the gold potato into uniform 1/2-inch cubes to ensure even cooking.
Heat the avocado oil in a large cast-iron skillet over medium-high heat until shimmering.
Add the diced potatoes to the skillet in a single layer and cook for 8-10 minutes, stirring occasionally, until they are golden brown and tender.
Push the potatoes to the outer edges of the pan and add the ground beef to the center, breaking it into small crumbles with a spatula.
Add the diced red bell pepper and yellow onion into the skillet with the beef.
Sprinkle the garlic powder, smoked paprika, sea salt, and black pepper over the entire mixture.
Cook for an additional 6-8 minutes, stirring frequently, until the beef is fully browned and the vegetables have softened.
Toss the potatoes back into the center to combine everything, then garnish with chopped fresh parsley before serving hot.