Can't beat THIS Portuguese soup recipe (unless you're vegetarian). You may want to cut it in half unless you're serving more than four people. Also, "for a thicker consistency, coarsely mash some of the beans before adding them to the soup."

http://www.myrecipes.com/recipe/swee...0000001591026/

2 tablespoons olive oil
4 cups chopped onion (about 2 large)
1 teaspoon salt, divided
1/2 teaspoon crushed red pepper
6 garlic cloves, thinly sliced
1 pound sweet turkey Italian sausage
8 cups coarsely chopped peeled sweet potato (about 2 1/4 pounds)
5 cups water 4 cups fat-free, less-sodium chicken broth
1 (16-ounce) package prewashed torn kale
1 (16-ounce) can cannellini beans or other white beans, rinsed and drained

Preparation
"Heat oil in a large Dutch oven over medium-high heat. Add onion; sauté 5 minutes. Add 1/2 teaspoon salt, pepper, and garlic; sauté 1 minute. Remove casings from sausage; add sausage to pan. Cook 5 minutes or until sausage is lightly browned, stirring to crumble. Add potato, 5 cups water, and broth; bring to a boil. Reduce heat, and simmer 8 minutes. Gradually add kale; cook 10 minutes or until tender. Stir in remaining 1/2 teaspoon salt and beans; cook 5 minutes or until thoroughly heated."