Portugese Bean Soup

From Real Age Diet
( serves 4, makes about 7 cups of Soup)

Ingredients
2 t Olive oil
1 cup coarsely chopped white onion
3 cups vegetable broth or water
1 cup diced ( 1/2 inch) unpeeled sweet potato ( Diced and peeled butternut or delicata squash can be substituted too)
3 to 4 t chilli garlic sauce or chili puree with garlic
1 can diced tomatoes undrained ( or dice 2-3 fresh tomatoes)
2 cups cooked great northern or cannnellini beans
4 t balsamic vinegar (optional)
4 cups packed sliced Swiss Chard or Collard Greens ( Kale, turnip or beet greens can be substituted too)

Directions
Cook onion in heated oil in saucepan for three minutes or so. Add broth, sweet potato and chili sauce; bring to boil over high heat. Reduce heat; simmer uncovered five minutes. Stir in tomatoes and beans; return to simmer. Stir in greens. Simmer five minutes until greens or potatoes are tender. Stir in vinegar if desired and ladle into 4 serving bowls.
The soup maybe be purred if desired; or thickened to served over bed of pasta or baked potato or rice or grain for that matter.