Boil pasta and drain the water

For white sauce:-

Heat butter in pan

Add all flour maida saute it for a minute

Add milk and cook it till it becomes thick

For red sauce

Saute onion till it becomes transulent

Add capsicum cook for few minutes

Now add tomato puree and let it cook for 2-3 minutes.

Add boiled pasta to red sauce mix it gently.

Finally add white sauce and let it cook for 3-4 minutes.

Add cheese on the top and serve hot.