Take water in a sauce pan, add salt and oil to it. Boil it.
When it starts to boil, add the pasta and cook in medium flame. Stir in between.
Keep cooking and make sure you stir in between. Cook until it becomes soft but not mushy. It should have the crunch to bite at the same time it will slightly bend, thats the right stage. Cut with a spoon to check. Switch off and drain water.
Rinse it well in running water. Strain, drizzle oil fluff it up and now its ready. So you can use it for your recipes. Now cooked pasta ready.
To a pan heat oil, add garlic, onion and saute till transparent.
Then add carrot, tomato, beans and capsicum. Saute for 3-5mins cook covered for 2mins until slightly soft.
Now cool this completely then transfer to mixer jar and puree it, set aside.
Heat butter let it melt. Now add this puree along with chilli flakes, mixed herbs and required salt.
Add pasta and toss well. Serve Veg sauce pasta hot!