Remove the seeds from the pumpkin and place them in a large bowl; cover with water.
Using your hands, separate the seeds from the pulp (the seeds will float to the top while most of the pulp will sink to the bottom, especially the larger pieces).
Remove the seeds to another bowl; cover with water and swish them around to rinse and remove any remaining pulp. Note: You likely will still have a few bits of pulp here and there, and that's okay. Just get as much off as possible so that they seeds will be able to get nice and crisp in the oven.
Remove the seeds from the water (I put them on a tray lined with paper towels); pat dry with paper towels or a clean kitchen towel. Note: You probably won't get them completely dry, and that's okay. Just get them as dry as you can so that they don't steam rather than roast in the oven.
Place the seeds in a bowl; toss with the olive oil, salt, and pepper.
Spread the seeds out on a large baking sheet lined with parchment paper.
Roast for 20 to 30 minutes, stirring every 10 minutes, until the seeds are golden brown and slightly crisp. Note: They will crisp up even more as they cool. Keep an eye on things towards the end of the cooking time, as the seeds can go from golden brown to overcooked quickly.
Allow the seeds to cool in the pan, and then enjoy!
Recipe Notes
Roasted pumpkin seeds are best when fresh from the oven, but they will last for several days stored in an airtight container at room temperature.
I like to keep my seasonings simple to allow the natural flavor of the pumpkin seeds to shine through, but feel free to add your favorite seasonings!
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