Soak the bread slices in water for a minute and then squeeze out all the water.
Add this to the minced meat together with salt to taste, green chillies and the garam masala powder.
Beat the egg and add this to the mince mixture as well. Mix well.
Divide into different portions and shape into ½" size balls.
Heat the oil in a kadhai and fry the onion till it is translucent. 
Add the tomatoes and fry for another 2-3 minutes.
Mix all the spices in half a cup water to form a spice mixture.
Add this spice mixture to the onion and tomatoes. Lower the heat and add 2 cups of water.
Bring the gravy to the boil and slowly add the koftas a few at a time.
Allow the koftas to simmer in the gravy for at least 5-6 minutes or until they are set and cooked.
When the curry is ready, mix in the coconut milk and cook for another minute.
Serve hot garnished with coriander leaves.