Preheat the oven to 180C/350F degrees
In a medium bowl beat the eggs with the Greek yoghurt until smooth.
Add the oat fiber, coconut flour, psyllium husk powder, onion powder, xanthan gum, baking powder and salt and using a spatula or spoon mix into a dough.
Add the apple cider vinegar and continue to mix the dough.
If the dough is too dry add the hot water a tablespoon at time. If you find your dough too sticky, add more oat fiber.
Let the dough rest for 5 minutes for the psyllium husk powder to expand.
Cut the dough into four even pieces and roll into a small ball. Roll each ball out into a rope about 5 – 6 inches long.
Place the dough ropes onto a parchment lined baking tray and seal the two ends together to make the bagel shape.
Brust the bagels with the egg wash and scatter the dried onion on top.
Bake for 20-25 minutes until golden.
Set aside to cool.