Preheat the oven to 325°F.
In a medium bowl, combine the almond flour, flaxseed meal, shredded cheddar, 2 tablespoons of the sesame seeds, chia seeds, salt, and garlic powder. Stir in the egg and olive oil until a thick dough forms.
Let the dough rest for 3 minutes so the flax and chia absorb moisture. Then place it on a sheet of parchment paper and top with a second sheet. Roll the dough out as thin as you can, aiming for 1/16 to 1/8-inch thickness.
Remove the top parchment and sprinkle the remaining tablespoon of sesame seeds evenly over the surface. Press them in gently with the rolling pin. Score the dough into small squares with a pizza cutter.
Transfer the parchment with the dough onto a baking sheet. Bake for 22 to 26 minutes, until the crackers are firm and golden, especially at the edges.
Turn off the oven and let the crackers sit inside with the door cracked open for another 10 minutes. This ensures they are perfectly dried through. Cool completely, then snap apart and serve.
