Into a large mixing bowl whisk the buckwheat flour, brown rice flour, sorghum flour, potato starch, tapioca starch, oat flour, yeast, brown sugar, spices and salt.
In a medium bowl whisk together the water, milk, microwaved apple puree, and psyllium husk until combined. Use an immersion blender to completely mix in the psyllium husk powder.
Pour the psyllium mixture into the middle of the flour blend and stir with a spoon to create a shaggy dough.
Place the dough on a lightly floured work surface, knead and and shape the dough until it forms a ball.
Place a large sheet of parchment paper on the work surface, and dust the paper generously with flour. With a rolling pin, roll out the dough to a rectangle that's roughly 12 inches by 9 inches.
With a spatula, evenly spread the apple pie filling on top of the rolled out dough, leaving a small gap around the edges.
Use the parchment paper to roll up the dough, but without having the paper rolled up inside. Slice the dough roll into 8 pieces.
Cover the rolls with a damp tea towel and leave them to rise in a warm place for about an hour to rise. This time will depend on the room temperature.
Preheat the oven to 425ºF and bake for 15 minutes at 425℉ Reduce the heat to 375℉, and bake for a further 15 minutes or until golden brown and risen. Remove the rolls from the oven and place them on a wire rack to cool for 10 minutes