First, let's make a gluten-free pie crust. In a large bowl combine corn flour, tapioca flour, buckwheat flour, baking powder, salt, sugar, and xanthan gum.
Next, melt margarine add it to the flour mixture and combine. At this moment add soy milk depending on the consistency. The dough should be thick but easy to work with.
Divide the dough into a 1:2 ratio. Use the bigger part of the dough for the crust. Transfer the dough to a pie pan and gently press with fingers to the sides and bottom. The dough should be 0.2 inches thick.
Set the smaller part of the dough aside and prepare an apple filling.
Peel and chop apples into small pieces. Transfer them to a medium-sized pot along with water, sugar, and cinnamon. Cook until the apples are soft or the water evaporates. It should take around 5 minutes.
In a cup mix together 1/2 cup of water with cornstarch and pour it into the mixture. When the apples are starting to thicken remove them from the heat. Lastly, add lemon juice and vanilla.
Carefully pour the apple mixture into the crust and now we can cover them with the leftover dough.
Roll the dough and cut stripes. But be careful, gluten-free dough can be tricky. You need to be very careful when cutting these stripes. I used a knife to help me transfer the stripes from the wood board onto the pie.
Lay them on top of the pie and brush the top of the pie with soy milk.
Bake at 400F (200°C) for about 30 minutes or until golden. Enjoy!