Warm the butter, sauté the leek and potato for approx. 2 mins., leave to cool. Stir in the meat, breadcrumbs and paprika, season. Knead the mixture well, divide into 12 portions, shape into little sausages, thread each sausage onto a wooden skewer. Heat the clarified butter, reduce the heat, fry the mince skewers in batches for approx. 6 mins. each, turning frequently.
Warm the butter, sauté the quinoa for approx. 2 mins. while stirring, add the vegetable stock, bring to the boil and simmer (uncovered) for approx. 10 mins. over a low heat, add the leek and simmer for approx. 2 mins. Stir in the Mascarpone, season. Serve the mince skewers on the creamy leek quinoa.