Cut potatoes in half and place in a large pan, cover potatoes with water and add a little salt.
Cook potatoes until tender, then drain and place in a bowl.
In a skillet, heat butter and olive oil then add garlic and sage and saute until butter turns golden brown and frothy.
Drizzle over potatoes and then scatter parmesan on top and toss until all sides of the potatoes are coated.
Transfer onto a parchment paper lined cooking tray and place in preheated oven at 425 and cook until golden on all sides, shaking the tray every fifteen minutes to make sure all sides become golden.