Heat orange juice and 100 g sugar in a pot. Simmer over high heat for 5-8 minutes. Stir in liqueur and let it cool down. Wash the potatoes and cook in boiling water for 25-30 minutes.
Drain the potatoes, rinse with cold water and peel. Press through the potato press while still hot, let it cool down. Wash and clean the strawberries and cut them into pieces. Wash the mint, dab dry, put some aside for garnishing, cut the rest into fine strips.
Mix strawberries, mint and orange syrup and set aside. Add flour, starch and egg to the potatoes. Season with about 1 level teaspoon of salt and knead to a dough. Form into finger-thick rolls on a work surface dusted with flour.
Cut into 5-6 cm long pieces. Form these into potato noodles with pointed ends. Bring plenty of salted water to the boil in a large saucepan. Cook the potato noodles in portions for about 3 minutes until they float on top.
Take out with a skimmer and drain on a tea towel. Heat 25 g butter in a large frying pan and fry the potato noodles on a medium heat until golden brown. Melt 75 g butter in a second pan.
Briefly roast the poppy seeds and 2 tablespoons of sugar. Add poppy seed butter to the potato noodles and turn briefly. Serve with the marinated strawberries. Dust with icing sugar and serve immediately, decorated with set aside mint.