Heat up a large pan.
Add 1 1/2 litres of water, spices and salt and bring to a boil.
Add rice.
Bring to a boil and lower the heat.
Add lemon juice and continue to boil, stirring occasionally, until cooked. Keep this aside.
Heat oil in another pan.
Season with curry leaves, ginger, garlic and green chillies.
Stir on a medium heat, until the garlic is light golden.
Mix coriander powder, chilly powder and turmeric powder in two tbsp of water to a smooth paste.
Add the above paste into the pan.
Stir, until the moisture evaporates.
Add the prawns and salt and sautT for a while. Cook covered until done adding little water in between.
Remove from heat and keep cooked prawns aside.
Heat ghee in another pan.
Add onions and stir-fry on a medium heat, until golden.
Add the prawns and stir, until the moisture has almost evaporated.
Add the rice and stir carefully for 2 - 3 mins.
:- Make sure that the rice does not break.
Remove to a serving dish.
:- Serve hot.