Macher Teler Chorchori aka Fish Fat, Fish liver and fish intestine mishmash with Potatoes and Eggplant is a Bengali delicacy.
I don't add any spices apart from Chili, turmeric, and salt. You may, however, add little Garam Masala while making the Macher Teler Chorchori. However, I feel the dish calls for domination by the fishy aroma, not the spices.