Fact: I have bags of vegetable puree in my freezer. This is convenient in many ways, but especially when we're going to eat canned soup.
Ever since I learned how to make my own creamy, delicious soups from scratch, I don't really like canned soup. But when I'm too sick to cook, it's a better choice than fast food, so sometimes we do it.
Adding vegetable purees makes canned soups a lot more healthy and delicious. I usually select something that will hide well or I know my family won't mind. For example, in a beef broth soup that's already brown, they probably won't notice some spinach puree that just makes the brown slightly darker and greener. They probably won't notice carrot puree added to a chicken broth or cauliflower puree added to a creamed soup.
The more vegetable puree you can add and the more variety, the better. This will bulk your canned soup with added vitamins and fiber and reduce the sodium content per serving. Grinding in a little black pepper is usually my final finishing touch, and then we've got a super quick meal that tastes just a little more homemade.