In a large skillet/wok, caramelise onions and garlic.
Add rice to wok and stir for a minute before adding water.
Add the water, cover wok, and bring to boil.
Lower the heat and simmer for 15-20 minutes, or til the rice is cooked.
When the rice is cooked, add beans and heat through.
Scatter through coriander, Chillis, and tomatoes.
Serve with warmed tortillas and yoghurt.