Roast the cashew nuts in a pan without fat. Cook the pasta in boiling salted water according to the instructions on the packet. Wash ##mint##, shake dry and pluck the leaves from 4 stems.
Puree the yoghurt, 1 tablespoon of water, oil, cashew nuts and mint leaves and season to taste with some lemon juice, salt and pepper. Drain the pasta and mix with the pesto and serve. Sprinkle with parmesan slices and garnish with mint leaves.