Add the oat flour, salt and coconut oil to a large mixing bowl.
Add in the water and knead.
If your dough is still too crumbly, add more water, 1 tbsp. at a time, kneading well between each addition of water.
When done, the dough will be somewhat smooth and soft to the touch but have a firm density.
Place the dough on a piece of parchment paper.
Add another piece of parchment over the dough and roll flat.
Remove the top layer of parchment, and turn the dough over into your pie pan. Then carefully peel off the second piece of parchment.
Press the dough into the pie pan, working it with your fingers until you have nice, even coverage over your pie pan.
Use raw for pre-baked or no-bake pies, or bake in the oven at 350 F. for about 15 minutes just to get a light toast, for pies you'll bake. Do not over-bake this if you'll be baking it again with filling.
Please note that the nutrition data below is a ballpark figure. Exact data is not possible.