Potato Soup with chicken

1/2 cup butter 3 ounces carrots , finely chopped 3 ounces celery , finely chopped 3 ounces onions , finely chopped 2 quarts chicken stock 32 ounces potatoes ,[...]

6 slices bacon 3 -4 tablespoons flour 1/2 a head of broccoli (only the small florets) 1/2 large yellow onion , chopped 2 tablespoons celery , chopped with[...]