01 - Set the oven to 325°F and line a baking sheet with parchment paper.
02 - Rinse pumpkin seeds under cold water and dry thoroughly using a clean kitchen towel.
03 - In a mixing bowl, blend olive oil, sea salt, smoked paprika, ground cumin, cayenne pepper if desired, garlic powder, and black pepper until evenly mixed.
04 - Add the pumpkin seeds to the seasoning mixture and toss until all seeds are evenly coated.
05 - Spread the coated seeds in a single layer onto the prepared baking sheet.
06 - Roast the seeds for 20 to 25 minutes, stirring once halfway through, until golden and crisp.
07 - Remove from the oven and allow the seeds to cool completely before serving.