ground red chile powder or cayenne(any spicy chile powder will do)
Save the seeds from a carved pumpkin. Remove any stringy pumpkin bits. Rinse thoroughly then pat dry with paper towels. Allow to air dry for 10 minutes. In the meantime preheat your oven to 350F and have a cookie sheet ready to use.
Spread the cleaned and dry pumpkin seeds onto a large plate. Drizzle about 1 to 1.5 Tablespoons of olive oil then stir until all of the seeds are well coated. Squeeze one small lime over the pumpkin seeds and stir well. Sprinkle in the salt and again mix well. Next add the ground chile powder -- the amount it up to you. I used like half a Tablespoons. Mix until all of the ingredients are well combined.
Spread the pumpkin seeds onto a baking sheet. Try to create just one layer, don't crowd them too much. Place in center of oven and roast for 10 minutes. Carefully remove from the oven then give them a good stir. Place back in the oven and roast for another 8 minutes. Again take them out to stir and check their texture. You'll need to repeat these steps until your pumpkin seeds are crispy -- keep a close eye on them because they'll burn quickly. Remove from the oven and allow to cool down in a cool and dry place. Serve pepitas or store in an airtight container.