Mix all in a pan and let it simmer until it turns into a thick paste. Adjust the seasoning and keep it aside.
White Sauce
In a pan over med-low heat add milk and heavy cream. Stir it continuously. Add salt, red chili and keep stirring it until it starts getting thick. Add both cheese and keep stirring continuously till all the cheese melts and you are left with a nice somewhat thick sauce. Add the red sauce to it and mix well.
Pasta
Mix the freshly boiled pasta and garnish with basil if desired.