Bengali macher jhol (fish curry) Recipe

This is an authentic bengali cuisine prepared in every household of kolkata, fish prepared in tomato and yogurt based curry and infused with the flavors of mustard oil and bengali panch phoron masala (nigella seeds, cumin seeds, fennel seeds, mustard seeds and fenugreek seeds.) this is a healthy dish and considered auspicious. Inspiration for this dish is my mom. Traditionally it is made with ruhi (rohu), but fishes like tilapia, swai, pomfret or butterfish also taste good in this curry.