Dice the russet potato into small, uniform 1/2-inch cubes to ensure they cook quickly and evenly.
Place the potato cubes in a microwave-safe bowl with a splash of water, cover, and microwave for 3 minutes to par-cook them.
Heat the olive oil in a large cast-iron or non-stick skillet over medium-high heat.
Add the par-cooked potatoes to the skillet in a single layer and cook undisturbed for 4-5 minutes until the bottoms are golden and crispy.
Push the potatoes to the outer edges of the pan and add the ground beef to the center, breaking it up with a wooden spoon.
Stir in the diced yellow onion and red bell pepper with the beef, cooking until the meat is browned and the vegetables are tender.
Sprinkle the garlic powder, smoked paprika, sea salt, and black pepper over the entire mixture and toss well to combine.
Continue to cook for another 2-3 minutes, allowing the flavors to meld and the beef to fully crisp up.
Remove from heat and garnish with freshly chopped parsley before serving.