Cabbage Soup without stock

I used to watch my mother cook when I was a kid. I found out very quickly that she didn't always use recipes. Instead, she would add a pinch of this, a[...]

1 head cabbage 1 large yellow onion 2 green bell peppers 1 bunch celery 5 -6 large carrots (peeled ) 1 (7 ounce) can mushrooms 1 -1 7/8 ounce vegetable soup[...]