Meanwhile, for the sautéed potatoes, parboil the potatoes in lightly salted boiling water for 5-6 minutes. Drain well. Heat 3 tsp butter and 1 tbsp oil in a frying pan and cook the potatoes over a medium to high heat, stirring occasionally, for 5 minutes, or until browned on all sides. Sprinkle with the remaining oregano, and season well with salt and pepper.