Remove the pulp and fibers from the pumpkin seeds by washing them in a colander. Dry with a towel thoroughly.
In a small mixing dish, combine the pumpkin seeds, olive oil, salt, garlic powder (if using), and black pepper.
Preheat the oven to 350°F (175°C). Lightly oil a baking sheet. Distribute the seasoned pumpkin seeds equally on the pan.
Toast the seeds for 12 to 15 minutes, stirring every 5 minutes, or until golden and crunchy. Every stir, check for denseness by tasting a seed for crunchiness.
Allow the toasted pumpkin seeds to cool in a colander.