Preheat your oven to 400°F and line a baking sheet with parchment paper.
Dice the russet potato into small half-inch cubes to ensure they roast quickly and evenly.
In a bowl, toss the potato cubes with the avocado oil, smoked paprika, garlic powder, sea salt, and black pepper until well coated.
Spread the potatoes in a single layer on the baking sheet and roast for 20-25 minutes, tossing halfway through, until they are golden brown and crispy.
While the potatoes roast, finely dice the red bell pepper and yellow onion.
Heat a large non-stick skillet over medium-high heat and add the ground beef, breaking it apart with a spatula.
Add the diced onions and peppers to the skillet with the beef and cook for 7-8 minutes until the beef is fully browned and the vegetables are tender.
Once the potatoes are finished roasting, add them directly into the skillet with the beef mixture.
Toss everything together for 1-2 minutes to allow the flavors to meld and the potatoes to soak up the savory juices.
Garnish with freshly chopped parsley and serve immediately while hot.