Complex sentence: Highland Park is one of the few distilleries to malt some part of the barley it uses, blending locally cut peat from Hobbister Moor with heather before being used as fuel.
Split into simpler sentences: Highland Park is one of the few distilleries to malt its own barley, using locally cut peat from Hobbister Moor. The peat is then mixed with heather before being used as fuel.