a picture of tomatoes, until I can get something better
food pic
If you can't get white onion soup, use leek and potato or any mild white soup.
You may want to bookmark this recipe, it's so useful. It stays on the site, even if it isn't part of this week's menu plan.
Cheese and Onion Soup
For two to three people, you will need:
 

1 package white onion soup
1 cup skim milk
water as directed, less one cup
1 1/2 cups grated cheddar cheese

Make up the white onion soup according to the directions, except substitute one cup of milk for one of the cups of water. Cook for the required time. Stir in the cheddar cheese and heat until melted through.