Boil pasta in a cooker
In a pan heat oil
Add chopped onion saute little
Add capsicum saute it
Blanch tomato in a pan when it becomes soft grind it in a mixer
Now transfer it to the onion capsicum pan
Let it cook for some time.add red chilli flakes and salt
Add tomato sause
Add boiled pasta .mix it nicely.
Red sause pasta ready to be served