Have you considered asking your local library if they can do an interlibrary loan to get you the book? Most libraries offer some form of interlibrary loan -- there may be a small fee, but in my experience they're often free. It exists in various libraries on WorldCat: https://www.worldcat.org/title/vegetarian-soups-for-all-seasons-a-treasury-of-bountiful-low-fat-soups-and-stews/oclc/33665910 -- if you give your local library that link they can probably order it for you.

Alternately, you can buy the book used for about $5 on Amazon: https://amzn.to/2LiAO9F (it says 40 cents but, you know, shipping).