Braise onion till browned up add cummin seeds, fenugreek seeds, mustard seeds and curry leaves let it splutter add tomatoes and all spices. Make paste like add peas and little water and cook till almost done add potatoes and lower flame, cover it.
When potatoes and peas done add the rest of veggies and simmer till done and dried up. When done garnish with chopped chillies and coriander leaves.

NB: Can add brinjals, brocolli or carrots too