Separate the insides of the pumpkin from the seeds (I did this step by hand, easiest way I could find). Using a strainer, run the seeds under cold water. Bring a medium pan to boil and place the seeds inside, boiling for 25 minutes.
Once the seeds are done boiling, preheat your oven to 400. Place a piece of wax paper on a baking sheet, add your seeds, and drizzle oil over the seeds to lightly coat. Sprinkle salt and cinnamon to cover, then bake for 25 minutes. Pull them out of the oven and let them cool, then serve by themselves or as a topping.