Wash the potatoes, bring to the boil covered with water and cook for about 20 minutes. Wash chicken legs and pat dry. Season with salt and pepper. Put them on the fat pan of the oven and spread with 1 tablespoon of oil.
Roast in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for approx. 25 minutes. Drain potatoes, rinse and peel. Peel and chop garlic. Wash and halve chillies, remove seeds and chop pod coarsely.
Mix garlic, chilli pepper, cumin, paprika, salt and olive oil. Then puree with a blender. Season the sauce with vinegar. Heat 2 tablespoons of oil in a pan. Fry the potatoes until golden brown.
Season with coarse salt. Arrange chicken legs and potatoes on plates. Garnish with garlic and parsley. Serve with mojo sauce.