1. Garlic :
If using raw garlic then 2 to 3 is more than enough since the flavor will be strong. But roasting mellows the strong flavor and gives it a delicious aroma and sweetness, hence you need more. We love to use it roasted and don't care much for the raw flavor.
2. Tahini :
Depending on the flavor of eggplants and the Tahini you are using, you might need to add in some more Tahini. Start with 2 tbsp and gradually add in more as per taste.
3. Cumin Powder :
Making your own powder is ridiculously easy. Just dry roast cumin in a skillet and grind it into fine powder. A coffee grinder
can be put to a good use here.