1.You can marinate for minimum 1 hour to maximum 3 hours. If you wish to marinate it overnight, then refrigerate 10 mins after applying the paste over the fish pieces. Keep out of refrigeration at least 30 mins to 1 hour. Then add oil, mix to coat and then grill.
2.If you want to grill using cast iron pan, pre heat the pan with a thin oil layer, when the oven is preheating. Then pop in the fish pieces and continue to grill.
3.You can substitute Pomfret with any other fish.
4.You can shallow fry this fish in pan. Once oil is hot, fry just for 3 to 4 mins in each side in medium flame.
5.For babies below one year, you can skip chilli powder and salt. You can use little amounts of all other ingredients.
6.I usually use plain chilli powder and ¼ tsp of my Fish fry masala for the spices. You can make this fish fry masala and keep it handy. You shall use this for all fish fry & grills. You can add this to grilled chicken too to elevate the flavor. I add this to my potato grills too..
My fish fry Masala Recipe
Dry fry the below spices in low flame, cool down and grind to powder..
1 levelled tbsp - Coriander seeds/Malli vidhaigal
1 levelled tbsp - Bengal gram/Kadalai Paruppu
Dry red chillies - 10
Once the bengal gram starts to change color, add the below & roast along till jeera gets little dark(don't darken much as it will turn bitter) ..
1 heaped tbsp - Peppercorns/Milagu
1 levelled tbsp - Fennel seeds/Sombu
1 levelled tbsp - Cumin seeds/Jeera
1 little finger size - Cinnamon stick/Pattai
¼ levelled tsp - Cloves/Krambu
1 levelled tbsp - Rock Salt