I haven't made any onion soup since I started low carbing as onions are sort
of carby but had a hankering for some tonight so I invented a new soup with
some lower carb additions. It turned out very tasty.

Onion Plus Soup

5 medium onions, sliced
2 large portabello mushrooms, cut in small slices
2 medium zucchinis, sliced (not peeled)
6 cups water
1.5 Tablespoons Minor's Beef Base
2 teaspoons Minor's Mirepoix
About 6 Tablespoons butter

Cook the onions and mushrooms in butter, stirring frequently, until the
onions are soft and brown around the edges. Remove from pan and do same to
the zucchini with more butter. Add water and beef base and mirepoix. Bring
to boil and simmer for about 10 minutes. Put in bowls and put some cheese on
top.   I figure about 8 net carbs per cup, had about a cup and a third for
supper.

You could use any kind of beef broth instead of the Minor's, it is the best
base/broth I have ever used and cheaper and easier to store than canned
broth. The Mirepoix is optional, if you have it, it adds a nice flavor.

I make this in my Wok as it is much easier to stir the vegetables in it than
a regular pan.