In a bowl, mix together the oat flour, whole wheat flour, salt, and sesame seeds.

Add in the oil and water and mix/knead until a dough forms.

On parchment paper or a silicone baking mat, roll out the dough as thinly as possible, and then roll it even thinner.

Sprinkle the top of the rolled-out dough with sea salt and use your rolling pin to press the salt into the dough.

Score the dough into whatever cracker shapes you desire.

Bake for 10-15 minutes, until golden brown, checking often after 10 minutes so that they don't burn.

Remove from the oven and allow them to cool before breaking apart along the scored edges and storing in an airtight container.