Pat steak dry with paper towels. Season both sides generously with salt, pepper, Kinders seasoning, and garlic powder.
Let the steak sit at room temperature for about 15 minutes while you cube your potato.
Heat olive oil in a skillet over medium-high heat.
Sear the steak for 3–4 minutes per side (for medium-rare, adjust based on thickness).
Add the butter, garlic, green onions, and pimentos to the pan.
Tilt the pan and spoon the melted butter mixture over the steak for another 1–2 minutes until deeply golden and flavorful.
Remove the steak from the pan and let it rest on a plate. Don’t wipe out the pan — this is where the flavor lives!
Add the cubed potatoes to the skillet with the remaining butter and drippings.
Cook over medium heat, stirring occasionally, for about 12–15 minutes, or until golden and fork-tender.
Season with a little more Kinders, salt, and parsley, if needed.
Slice the rested steak against the grain.
Return the slices to the pan, nestling them into the potatoes.
Spoon any remaining butter over the top, garnish with parsley, and serve immediately.