Add the cashews to a medium bowl. Pour in enough warm water to completely cover the cashews, then soak for at least 2 hours, or overnight. Drain.
2. Step
Grease 4 4-ounce ramekins with coconut oil and set aside.
3. Step
Add the cashews to a blender with the water and a pinch of salt. Blend on high speed for 2 minutes, or until very creamy.
4. Step
In a medium saucepan over medium-low heat, combine the cashew cream, maple syrup, pumpkin puree, and pumpkin spice. Warm slowly, stirring occasionally, until the sugar is dissolved and the mixture is simmering.
5. Step
Add the agar agar to hot water and stir until there are no lumps and the agar agar is fully dissolved.
6. Step
Pour the agar mixture into the warm cashew cream and whisk to combine. Increase the heat to medium, bring to a gentle boil, and whisk continuously for 3 minutes, until thickened. Remove from the heat and immediately divide between the greased ramekins. Smooth the tops.
7. Step
Refrigerate for at least 30 minutes. (The agar will set at room temperature, but chilling the panna cotta in the fridge will expedite the process.)
8. Step
When ready to serve, use an offset spatula or butter knife to carefully work around the edges of the ramekins to loosen the panna cotta. Invert onto serving plates and garnish with ground cinnamon and cinnamon sticks.
