Clean, wash and cut Irumban Puli(preferably vertically). Add the green chilli pieces also into these Irumban Puli pieces and keep them aside.
Clean and cut/crush shallots and ginger and keep it separately.
Grind coconut along with turmeric powder, chilli powder and coriander powder and some water and keep this paste separately.
Add curry leaves, ground coconut and salt into the Irumban Puli pieces.
Then add required quantity of water also into this mix, stir it well and cook for about 10–15 minutes in medium flame.
When the Irumpan puli pieces and other ingredients are cooked properly, add the crushed shallots and ginger into this mix and boil again for about for about 5minutes. Now put the heat off. Heat some oil in a cheenachatti/frying pan, add mustard seeds, curry leaves and red chilli pieces and stir it well. When colour changes into golden brown, pour the seasoning into the already cooked Kerala Style Bilimbi Curry.
Serve the dish with cooked rice.