Preheat oven to 375°F. Add parchment paper to a baking tray.
Wash pumpkin seeds and pat dry. Add to baking tray.
Roast at 375°F for 15 minutes. Remove from the oven and turn the oven to 350°F.
Add a small amount of olive oil to the seeds (just enough to lightly coat the pumpkin seeds) and shake the baking tray to coat the seeds. Sprinkle seeds with brown sugar if using, pumpkin pie spice, salt, and pepper. Return to oven.
Shake baking tray every 5 minutes or so until the seeds are golden brown (approximately 15-25 minutes), watching carefully that they do not burn (with the brown sugar). Add additional salt to taste. Enjoy!
Notes
Makes 4 cups using 2 baking trays. Can be halved or doubled easily.
The number of seeds in a pumpkin will vary. Adjust the oil to just lightly coat the seeds.