Preheat your oven to 400°F and line a large baking sheet with parchment paper for easy cleanup.
Dice the russet potato into small 1/2-inch cubes and toss them with 0.5 tsp olive oil, 0.125 tsp sea salt, and 0.125 tsp black pepper.
Spread the potatoes in a single layer and roast for 20-25 minutes until they are golden brown and tender.
While potatoes roast, heat the remaining 0.5 tsp olive oil in a large skillet over medium-high heat.
Add the diced yellow onion to the skillet and sauté for about 4 minutes until it becomes translucent and fragrant.
Add the ground beef to the skillet, breaking it into small crumbles, and season with garlic powder, smoked paprika, and the remaining salt and pepper.
Cook the beef until it is thoroughly browned, then stir in the chopped green beans.
Cover the skillet with a lid and cook for 5-6 minutes, or until the green beans are vibrant and crisp-tender.
Gently fold the roasted potatoes into the beef and bean mixture, tossing well to combine all the flavors before serving hot.