Cook the potatoes Heat oil in a large skillet over medium heat. Add the potatoes and cook for 12–15 minutes, stirring occasionally, until golden and crispy. Transfer to a bowl and set aside.
Brown the ground beef In the same skillet, cook the ground beef over medium heat until deeply browned.
Add seasoning, onion, and butter Add salt, pepper, smoked paprika, thyme, onion, and butter. Cook for 3–4 minutes until the onion softens.
Add garlic Stir in the garlic and cook for about 30 seconds, until fragrant.
Combine everything Return the potatoes to the skillet and stir gently. Cook for 2 minutes.
Finish with sour cream Turn off the heat and stir in the sour cream. Garnish with fresh parsley and serve.