Heat 3 tbsp oil in a heavy bottomed pan and add the whole garam masalas. Once it splutters, add the sliced onions & fry on medium heat for around 12 mins till it starts turning brown.
Add 2 tsp ginger garlic paste & fry on low heat for around 1 min.
Now add the chopped green chillies & mint leaves and continue to fry on low heat for another minute.
Add 1.5 tsp coriander powder and add a splash of water to prevent it from burning.
Fry on low heat for 1 min.
For 2 cups (400gms) basmati rice, add 700 ml water & let it come to a boil.
Add 2.5 tsp salt & 1/4 tsp garam masala powder. Mix well.
Once the water is on a boil, add the drained rice, mix well & cook on medium heat for 3-4 mins till the water nearly dries up.
Add the cooked prawns mixture, chopped coriander & curry leaves. Mix well and cover & cook on low heat for around 10 mins till the rice is cooked. Optionally add 1 tsp of ghee and give a mix.
Mix and serve