Bring two litres of water to boil.
Add the rice sevai and let it cook for 6-7 minutes or until soft.
Drain in a colander.
While the sevai is cooking, heat oil in a pan and add the spices.
Add onions and green chillies and sauté until translucent.
Add the spice powder and tomato and salt. Cover and cook until the tomatoes are mushy.
By the time the sevai is ready, the masala will also be ready.
Add sevai to the pan and gently mix.
Add chopped coriander leaves and serve hot with chutney or raitha.