Preheat oven to 375F and line a baking sheet with parchment paper.
In a small mixing bowl, combine olive oil, za'atar seasoning, salt, and pumpkin seeds. Stir to coat well.
Transfer seeds to prepared baking sheet, spreading them out evenly. If desired, give them another sprinkling of salt.
Bake in preheated oven for 10-15 minutes, stirring the seeds after each 5-minute increment. Bake until they're light golden-brown.
Remove from oven and let cool on the baking sheet. If needed, you can add more salt to taste at this point, depending on your preference.
Notes
Make sure your pumpkin seeds are totally dry before mixing with the seasonings. If you're scooping your own pumpkin seeds, rinse them well of any pulp, then towel dry or allow them to air dry. You can also transfer them to the oven at a low temperature to dry for a few minutes. Alternatively, you can buy raw pumpkin seeds online that are ready to go!
The amount of salt needed will depend on your personal preference and the amount of salt (if any) in your za'atar seasoning blend. I start with 1/2 teaspoon, then sprinkle a bit more salt on the seeds in the pan before roasting. After roasting, you can add more salt if needed.