I first had a variant of this soup at the Natural Food Grocery, here in Johnson City, TN. I subsequently, saw a variant in the Moosewood Cookbook. Mine is a bit different, but seems to work.
The Stuff That Goes in It
3-4 T. of olive oil
1 onion: chopped
2-3 garlic cloves: minced or crushed
1-2 "stalks" of celery
1 carrot: chopped
1 medium zucchini: in chunks
1-2 bay leaves
1 t. of oregano (or majoram)
1-2 t. basil
4 cups of chicken stock (or veggie or water)
1/2 can of tomato paste
1 t. lemon juice
1 cup of chopped black olives
green ones, too, if you want....
salt: to taste
pepper: to taste
chopped parsley, zucchini, diced tomatoes, diced hard boiled eggs: garnish
What to do:
Get a stock pot, saute veggies and herbs.
Add the tomato paste. Cook briefly.
Add the chicken broth, navy beans, olives, and lemon juice.
Simmer until the flavors blend
Put in bowls, garnish with chopped parsley, fresh zucchini chunks, and diced tomatoes.
Add a little fresh olive oil, too.
Serve with big chunks of bread and a good salad, and you have a meal.
Footnote: This is a variation of a recipe which can be found in Molly Katzen's Moosewood Cookbook. This is an absolutely wonderful cookbook, indispensible if you are a vegetarian, and damn near indispensible even if you are not.