How to make delicious Katla mach'er jhol. It is a bengali style fish curry recipe. It is served with hot steamed rice. Ingredients : Katla Fish - 600 gm Potato - 3 medium size Mustard oil - 2 & 1/2 tbsp Cumin seeds - 1 tbsp Dry red chilli - 6-7 pcs Black peppercorns - 14-15 pcs Cinnamon - 1 pc Cardamom - 3 pcs Clove - 4 pcs Kashmiri chilli powder - 1 tsp Bay leaf - 2 pcs Salt - to taste Turmeric powder - 3/4 tbsp Ginger paste - 3/4 tbsp Onion chopped - 1 big size Water - as required