I don't know why in this land of pumpkin pie we do not eat more of these great little seeds. Your local health food stores and Mexican markets will have the bright green hulled seeds for sale. Buy a lot and keep them in the freezer until you want to make this salsa, or toast them together with chiles pequins (tiny, round dried red chiles) and whole garlic cloves as a snack. Try this delicate salsa over broiled goat cheese or stirred into white rice just before serving. Then again, you might want to ladle it on some simple grilled chicken. Just try it.