Beat the eggs and sugar together until light and fluffyAdd the buttermilk and melted butter to the eggs and sugar mixture and mix well.Add all the dry ingredients and mix together well.Now add the muesli, seeds and raisins and mix again to distribute well.Pour mixture into a greased baking dish with deep sides (about 5cm) and cook for +-45 minutes at 180°CAllow the rusks to cool and then cut into desired size.Dry rusks out for about 10-12 hours in the oven overnight - put the oven onto 100°C and leave the door open slightly.