First marinate fish with turmeric ,salt, 1tbs redchilli pd and lemon.
Heat oil and Fry onion till golden brown
Ina kadai take oil add 1tbs ginger garlicpaste and stir tillraw smell goes
Add tomato puree
Add grinded or crushed brownonion
Add red chilli pd, coriander pd,mintleaves, coriander leaves, biryani masala very little salt and cook till oil seprates from masala
Now add fish and cook for only 1 min.
Check seasoning and switch off the gas
Add 2-3 chopped greenchillies
Keep water for boiling
Add 1-2 drops of oil, whole garam masala and salt
Once the water starts boil add rice and cook till80%
Drain the water from rice
Take heavy bottom vessel keep one layer of rice in the bottom
Now spread the fish masala over rice,mint leaves, coriander leaves and fried onion
Cover with another layer of rice
Add coriander leaves, mint, onion, ghee and food colour on top
Cook on low heat till 15 mins or you get smell of biryani.