In a bowl, clean the prawn and shrimp in running water and keep aside.
Marinate the prawn with salt, lemon juice and ginger-garlic paste. Squeeze it after 10 minutes and marinate with the coconut gravy, once it's ready.
Wash and soak the red rice. Boil it once the gravy is ready and serve hot.
In a pan, heat some coconut oil on a medium heat. Add curry leaves, onion, ginger, green chilli and saute.
Saute for five minutes. Add turmeric, coriander powder and both the chilly powders. Cook it for some time and then add the coconut milk.
Cook the gravy for some time and then add the shrimps.
Cook it for some more time and finish it with tamarind pulp and tomatoes.
Skewer the marinated prawn onto the satay stick. Sear the prawn on the grill and cook in the gravy.
Serve with hot boiled red rice, with a garnish of cherry tomatoes.