Bring the cane sugar, butter, sea buckthorn and salt to the boil in a pan.
In a bowl, mix the oats with all the other ingredients up to and including the apple rings. Add the warm syrup. Using a tablespoon, create 12 dough mounds on two oven trays lined with baking paper, leaving plenty of room between each cookie, flatten slightly.
Approx. 15 mins. per tray in the centre of an oven preheated to 160°C. Remove from the oven, leave to cool on a cooling rack.
spread yoghurt on the cookies, top with berries.