This dish will work with any unhulled toasted sesame seed (white, black, or gold). I don't recommend using hulled sesame seeds as these only include the seed's oily endosperm, which lacks the flavor and texture of the whole seed. As for pre-ground sesame, I usually avoid it for the same reasons I don't buy pre-ground black pepper. The flavors and aromas disappear pretty quickly once ground, so it's best to grind the sesame seeds yourself as you use them. You can read more about the type of sesame seeds to use in the Ingredients section above.