Steam four prepared parsnips and one pear together until soft. Mash together then set aside and allow to cool slightly.
Meanwhile heat 1 tbsp olive oil in a small frying pan over a medium heat and gently fry a sliced leek until softened. Allow to cool.
Place the cooked parsnips, pear and leek into a mixing bowl with a pinch of nutmeg, 1 tsp dried sage and 50g breadcrumbs. Combine with your hands until well mixed.
Using 30g plain flour shape into six balls and then flatten into burger shapes with your hands.
Heat a little oil in a frying pan and fry for around five minutes on each side until golden brown.