Here is a recipe for Tomato-Basil Soup with Shells. It's from my book, The Family Caregiver's Cookbook, and pictured on the cover. The Parmesan cheese garnish may be omitted.

2 tablespoons extra light olive oil
1 yellow onion, chopped
1 32-ounce carton unsalted chicken broth
1 28-ounce can tomato puree (15 mg. salt)
1 teaspoon salt (may be omitted or reduced)
1 teaspoon garlic powder
2 teaspoons sugar
1 1/2 teaspoons dried basil (or 2 tablespoons fresh basil, chopped)
1/2 cup small shell pasta

1. Pour olive oil into soup pot. Add onions and saute for five minutes.
2. Add other ingredients, except pasta.
3. Cover and simmer 5 minutes.
4. Add pasta and cook until tender.
5. Garnish with shaved Parmesan cheese if desired.