1. Preheat oven to 350 degrees F (175 degrees C). Line a baking sheet with parchment paper. Cut a small square out of a separate sheet of parchment paper and oil 1 side; set aside.

2. Blend brown rice, quinoa, and tamari in a food processor, adding water if mixture is too dry, until a dough starts to form. Add chia seeds, sesame seeds, flax seeds, and salt; pulse until dough is a sticky ball.

3. Roll small pieces of dough into 1/2-inch balls and arrange at least 2 1/2 inches apart on the prepared baking sheet. Place the oiled square of parchment paper, oil-side down, onto a dough ball. Flatten the dough ball into a very thin 2-inch-wide disk by pressing the top of a small jar onto the parchment square. Repeat with remaining dough balls.

4. Bake in the preheated oven until edges of crackers begin to brown, 10 to 12 minutes. Transfer crackers to a wire rack. Place the rack onto the baking sheet and return to oven.

5. Bake until crackers are dry and crisp, 2 to 3 minutes more.

Cook's Notes:

You can also divide the dough in half and keep half in the fridge for about a week, then make a second batch of these crunchy gluten-free crackers.

Baking time will vary depending on thickness of crackers, but thinnest is best.