This recipe makes thick, non-crumbly crackers that are nice to stack things on for "sandwiches". (Things like avocado slices or peanut butter.)
Grind 1-1/2 cups oatmeal flour from rolled oats with your seed grinder.
Add enough hot water to make a stiff dough, and then mix in as many sunflower seeds, poppy seeds, sesame seeds, and chia seeds as you can.
Taste to see if the balance is the way you like it. If not, change it until you do.
This makes an incredibly sticky mess. (Both oatmeal and chia seeds have oodles of natural "stickum".)
Spread the dough onto teflon as thin as possible. (Probably about 1/4" thick.)
Score them. (This is so you can break them apart when they are dry.)
Dry until hard.
NOTE: For best results, go heavier on the sunflower seeds and lighter on the others. (Sesame seeds tend to be bitter.)