Add the olive oil and 1 tablespoon of the butter to a large skillet over medium-high heat. Once hot, add the potatoes, garlic, thyme, and rosemary, season with salt and pepper, and cook for 3 minutes. Stir, and cook until potatoes are fork tender, about 3 minutes more. Remove to a plate and set aside.
Turn heat up to high and add remaining butter. Season steak bites liberally with salt and pepper, add to pan, and let sear for 1 minute. Stir and continue cooking steak until browned and cooked to desired doneness.
Add potatoes back to skillet, stir and top with parsley and chives.