Melt butter in a pan, add grain flakes and roast while turning. Remove from the pan and allow to cool. Finely chop the fruit mixture. Put the grain flakes, fruit mixture and sea buckthorn spread in a bowl and mix well with the dough hooks of the hand mixer. Beat the egg white until stiff and fold in portions
Line a baking tray almost halfway with baking paper. Fold an aluminium foil several times to form a rail (approx. 32 cm long). Spread the bar compound evenly on the side of the baking tray lined with baking paper (14 x 32 cm). Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 40-45 minutes. Remove from the oven, place on a cake rack and allow to cool for about 40 minutes. Then cut in half lengthwise and cut into 10 bars each
Place the bars on a baking tray lined with baking paper and bake at the same temperature for 18-20 minutes. Remove from the oven, place on a cake rack and allow to cool
Roughly chop the chocolate coating. Melt over a warm water bath, remove from the stove, allow to cool slightly and then reheat again. Remove from the heat, let it cool down a little and fill into a piping bag. Cut off a small corner and decorate the bars with it. Leave to dry
waiting time approx. 2 hours