I soak the cleaned seeds in salt water overnight in the fridge. Then drain, toss with a bit of kosher salt and seasoning, spread on a foil lined (or Silpat) cookie sheet. I roast at 275 for 15-20 minutes, till they get however toasted I want them. Just keep an eye on them, no matter what temp. They can burn very fast. No, I don't use any oil. Soaking overnight makes them nice and plump. I eat the whole thing, the shell is more fiber.
Seasoning - chipotle, pumpkin pie spice, cinnamon and brown sugar, use your imagination!