Step 1: 1) cook the pasta in boiling water for around 11 minutes ( varies by sort )
Step 2: 2) pour the soup into a medium sized pan and warm through on a low heat, then add the tomatoes and onions to the soup
Step 3: 3) once the pasta is cooked, drain it off and add to the soup. Give everything a stir and cook for a few more minutes all together. Sprinkle with the grated cheese and serve.