Put in a saucepan the lingonberries, the water and the rosemary twigs and boil for 10 minutes.
Add sugar and salt and mix.
Add the semolina flour and mix constantly for 7 minutes.
Let the porridge cool off in room temperature.
Once the porridge is completely cold, whip it for some minutes. You'll notice that the color of the porridge will change from a dark pink to a lighter hue.
Serve it cold with milk or cream.
You can store the porridge in refrigerator for two or three days.
Recipe by The Adagio Blog at https://adagioblog.com/whipped-lingonberry-porridge/