Heat the olive oil in a large non-stick skillet over medium-high heat.
Add the diced yellow potatoes to the skillet and cook for 8-10 minutes, stirring occasionally, until they are tender and golden brown.
Push the potatoes to the side of the pan and add the ground beef, diced onion, and red bell pepper.
Cook the beef for 5-7 minutes, breaking it up with a wooden spoon, until it is fully browned and the vegetables have softened.
Stir in the sea salt, black pepper, garlic powder, and smoked paprika until all ingredients are evenly coated.
Remove the skillet from the heat and let it rest for 60 seconds to prevent the yogurt from curdling.
Stir in the plain Greek yogurt until it melts into a smooth, creamy sauce that binds the beef and potatoes.
Garnish with freshly chopped chives and serve immediately.