Throw all ingredients into a high speed blender and blitz on fast for about 30 seconds (I put mine on the 35 second cycle, whilst grating cheese for the pasta). nb if you have a soup facility you can blend for 6 mins or so until piping hot.
Stir into hot pasta and top with cheese if desired.
Can also be easily heated in a pan if desired.Please note: calories and other nutritional information are per serving. They're approximate and will depend on exact ingredients used.