Whisk psyllium husk into the warm water and let sit for 5-10 minutes for a gel to form.

In a separate bowl, mix together the other dry ingredients - starch of choice, millet flour, sorghum flour, yeast, sugar (if using), baking powder and salt.

Into the psyllium husk gel, whisk the starter, eggs, maple syrup (if using) and oil.

Pour the gel mixture into the dry ingredients and mix with an electric mixer on medium to high speed for approximately 5 minutes until a very smooth dough has formed.

Using a spatula, scrape down the edges of the bowl and form dough into a ball/pile in the bowl.

Turn dough out of the bowl onto a well floured surface. Generously flour your hands and the dough so you can gently form it into a loaf.

Divide dough into even parts. For hamburger buns, divide into 8-10 equal parts. For sandwich buns, divide into 12.

Gently form each dough ball and place on a lined baking sheet.

Lightly cover pan with greased plastic wrap or a towel.

Preheat oven to 400°F.

Just before baking, lightly egg wash each bun.

Bake for 20-30 minutes or until just starting to turn golden brown.

Remove from oven and let cool completely before cutting.

Store on the counter for 2-3 days or slice and freeze.