Cook  1 tumbler of rice with less water adding little oil to it in the pressure pan. After the pressure releases, take out the rice and allow the rice to cool so that the rice grains get separated. Now wash and cut 1 onion, 3 tomatoes, 1 green chilli into very fine pieces. Keep aside. wash curry leaves, coriander leaves and keep aside. Now take the pan and heat it with 5 to 6 tsp of oil. Add half tsp of mustard seeds and let it splutter, then 1 tsp of channa dal, a very little garlic paste, saute for a few seconds, add onion, green chillie, curry leaves and stir till the onion gets little browned, then add the tomatoes, and stir till it softens, then add half tsp of garam masala , half tsp of red chillie powder, a pinch of turmeric powder, a little sugar if needed for taste, and also salt for the whole according  to your requirement and saute well. Add the chopped coriander leaves . Mix well. Now pour this mixture into the cooled rice and mix well . Your tomato rice is ready. If required you can reheat the mixed rice in a vessel  and keep it in  the pressure pan and switch on the stove without putting the weight for 5 minutes.