Whisk the two flours with the sugar, water, yoghurt, oil and baking powder. Fill four doughnuts moulds with the batter and bake at 170°C for 15 minutes.
Peel and core the pears. Slice one and cut the others into small cubes.
Cook these cubes in a little water then blend with the grated Grana Padano.
Serve the doughnuts with the pear purée and pear slices.