Bean Soup with stalks

2 cups beans, dried soaked 1 each onion chopped 2 each carrots peeled and sliced 1 each celery stalk, sliced 2 each tomatoes chopped 1/2 cup olive oil 1 x bay[...]

2 tablespoons butter 1 large sweet onion , diced 3 stalks celery , diced 1 small green pepper , diced 2 large garlic cloves , chopped 8 cups chicken broth 1[...]