Heat the oil and sautxe9 the onions till translucent. Add the potatoes, sweet corn and green peas. Stir a couple of times and add 2 xbd cups of water. You may need to add a little more water later.
Add the spices, salt and tomato ketchup sauce. Stir well, bring to a boil and then let it simmer on medium heat till the vegetables are half done.
Add the macaroni, stir again and allow to cook till the water is absorbed. When done, there should be no liquid in the pan, yet the pasta should be moist.
Depending on the pasta, you might need a little more of water. Once the pasta is almost done, if it is looking dry or undercooked, add 1/4 a cup of boiling water, stir and cook till this water gets absorbed.
Take the curried pasta off the heat. The pasta will continue to dry out a little. You may add chopped coriander as a finishing touch, if preferred. Serve hot.