Preheat the oven to 350F(180C). Line a large baking sheet with parchment paper.

Process the oats in a food processor or high-speed blender until they resemble either a rough or fine flour.

In a medium mixing bowl, stir the pumpkin puree, water, coconut sugar, and (optional) salt until blended (if adding optional extracts, zests, or spices, add them now).

Add the ground oats to the bowl (if adding optional extras such as chocolate, nuts, or dried fruit, add now). Stir until blended into a soft, thick dough.

Using a small cookie scoop or rounded tablespoon, scoop small mounds of dough onto the prepared baking sheet. Using fingertip, flatten the dough slightly into a round shape.

Bake in the preheated oven for 10 to 12 minutes until golden browned at the edges and the dough appears dry.

Transfer the cookies to a wire cooling rack. Cool for at least 5 minutes before eating.