Preheat oven to bake, 180C and line a muffin tin with paper cups, or oil them.
In a large bowl, mix together the flour, baking soda, cinnamon and salt until combined.
In a separate mixing bowl, stir together the shredded pear, chopped pear, eggs, honey, oil, milk and sourdough starter until smooth. Add the pear mixture to the flour mixture and stir until just combined.
Spoon the mixture into the muffin cups and bake for 20-30 minutes, or until a skewer inserted comes out clean and tops are golden brown. Remove from oven and let cool completely on a cooling rack. When they first come out they will be a little bit soft, so make sure you allow to cool to firm up!