Wash potatoes thoroughly under water. Peel onion, chop coarsely. Carve pepperoni lengthwise, remove seeds, wash and cut into fine rings. Wash and pluck the rosemary. Roughly dice the potatoes
Mix the potatoes, onion, pepperoni, oil and rosemary on the fat pan. Season with salt and pepper. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for 40-45 minutes until golden brown. 10 minutes before the end of the cooking time mix in olives
Coarsely crumble the sheep's cheese. Arrange the rosemary potatoes on a large plate and sprinkle the cheese over them