Prepare tomato sambal. Finely pound the chillies, prawn paste and tomatoes. Stir in the kalamansi lime juice. Set aside.
To make porridge, boil the rice, tapioca, lemongrass and ginger in a pot of water until half-cooked. Add the pumpkin and corn kernels and boil until rice grains are broken up and the porridge is cooked. Add water as required during the c