Grind coriander and cumin seeds and three red chillies coarsely. Grind garlic, green chillies and half the ginger to a paste. Cut the rest of the ginger into thin strips. Heat oil in a pan. Add the coarsely ground spice masala. Add the onions and sauté till golden brown. Add ginger-garlic-green chilli paste and sauté for one minute.
Add the vegetables except green capsicums and stir. Cook covered on low heat till carrots are almost done. Sprinkle a little water if necessary. Add turmeric powder, coriander powder and red chilli powder. Stir continuously. Add tomatoes, salt and half a cup of water and cook till the vegetables are cooked and the water has dried up. Add capsicums and salt cook for four to five minutes on low heat. Sprinkle garam masala powder. Serve hot, garnished with ginger strips and coriander leaves.