Mix the pumpkin, olive oil, Parmesan, herbs, pepper, salt, and garlic powder. Add the buckwheat flour, oat flour, oats, pumpkin seeds, and flax.
3 Let it stand about 5–10 minutes. Buckwheat and oats both absorb moisture, so the dough will firm up as it rests.
4 Roll between parchment sheets to about 1/8 inch, remove the top sheet, score into crackers, and dock with a fork.
5 Bake 25 minutes, separate or re-score, then bake another 15–25 minutes until thoroughly dry and crisp. If necessary, turn the oven off and leave them inside with the door cracked for another 10 minutes.