Peel and chop onions finely (A daunting task).
Take 1 tbsp cooking oil in a nonstick pan or handi.
Sauté onions in this oil till they turn brownish in colour.
Add tomatoes and all dry masalas and fry well.
Add small chunks of potato, mix properly and then add water.
Add salt, mix properly and let it cook for sometime till potatoes are half done.
Then, add all other vegetables (The frozen pack of mix vegetables available in the UK is very handy and also get cooked fast, but you can use fresh vegetables cleaned and chopped, and saute them for few seconds before adding them to curry).
Let the vegetables cook, on a minimum flame and adjust the consistency of curry as per your requirements.
Garnish with coriander leaves and serve with Rotis or Pita bread or even bread.