Combine the dry ingredients: In a bowl, mix the oat flour, coconut flour, psyllium husk, baking powder, and salt. Make sure they are thoroughly mixed.

Adding liquids: Add the egg white and start stirring, then gradually add warm water and knead with your hand.

Let the dough rest on the table for a full 5 minutes. You'll notice that the psyllium and coconut have completely absorbed the water, and the ingredients have transformed into a pliable, malleable dough similar to traditional dough.

Shape the dough into a long rope, then twist it and secure the ends to create a uniform bagel ring of normal size.

Decoration: Wipe the surface with a very light wipe of water or leftover egg yolk, and sprinkle with sesame seeds or black sesame seeds.

Baking:

In the oven: Preheat to 190°C and bake for 20 to 25 minutes, or until puffed and golden brown.

In the air fryer: Cook at 180°C for 15 minutes, turning for the last 2 minutes to ensure even crispiness.