Fry the crepes and prepare the cranberries. Make the cream: beat the yolks with powdered sugar until white, add mascarpone cheese and mix. Finally add the whipped, stiff cream and lemon juice, mix everything gently with a spoon. Keep the cream in the refrigerator until ready to spread on the crepes.
On each crepe spread about 2 - 3 tablespoons of cream and 1 tablespoon of cranberries, fold into triangles and serve.