Bring milk, sugar, 1⁄2 tsp. cinnamon and vanilla sugar to the boil while stirring. Add polenta while stirring. Simmer at low heat for about 5 minutes. Stir in butter and cream cheese. Divide into four bowls, let cool down, then put in a cool place.
Halve the lime and squeeze it. Wash mint, shake dry, pluck off leaves and chop coarsely. Peel the pitahaya, cut into cubes and marinate with lime juice and mint.
Peel the mango, cut the flesh off the stone and dice it roughly. Finely puree the mango and honey with a hand blender. Arrange polenta cream with pitahaya and mango sauce.