Mix the GF Flour Blend by whisking together the starch and flour. If you're using a stand mixer, mix all the ingredients with the paddle attachment for 3 minutes.
Combine and stir oat milk (300 g) and psyllium husk to soak for 2-3 minutes.
Dissolve the instant yeast with oat milk (80 g) and 1/4 of the sugar.
In a large bowl, combine gluten free flour blend, baking powder, sugar, and salt. Mix well.
Combine the liquids - oat milk, beaten eggs, olive oil, and dissolved yeast. Mix the dough partially, then add the orange zest and apple cider vinegar.
Mix the dough with your hands until the dough is well mixed and forms a ball. Likewise, knead for 4-5 minutes using a stand mixer fitted with a hook attachment. Use the rubber spatula to scrape the sides and bottom of the bowl occasionally to prevent any unmixed flour.
Cover the dough with a damp cloth or plastic wrap, and let it rise in the fridge for 45-60 minutes.