Preheat oven to 200°C.
In a medium-sized bowl, whisk together the ground flaxseeds and boiling water. Set aside for 20 minutes to thicken.
Put oat flour, potato starch, tigernut flour, baking powder and salt into a high speed blender and process for a few seconds.
After 20 minutes, add apple sauce to your flaxseed mixture.
In a large bowl, combine the flour mixture with the flaxseed apple sauce mixture using your hands until well combined. Make sure not to overmix the dough, otherwise it becomes too liquidly. I used a Theromix to knead the dough for 30 seconds.
You can now shape 6-8 bread rolls with wet hands and sprinkle with sesame seeds. Place them on a baking tray lined with baking paper and bake in the oven for 35 minutes.
Allow your bread rolls to cool completely before serving.