soup for dinner

i had half of a huge zucchini in the fridge... what to do, as everyone had enough zucchini bread and ratatouille?
i leafed through my soup book "soups and stews" which i have grew to treasure and for the past couple weeks has become a regular open book on my kitchen counter.
so here i go, finding the "herbed zucchini soup" and it's so simple i even added the garlic croutons to it, as the kids as well as the adults love toppings with soup.

ingredients::
zucchini
potatoes
yellow onion
chicken stock
buttermilk
to season, sea salt/ground pepper/thyme/majoram

i hope your family enjoys it as much as my folks around the table tonight did "en guete"